We've gone through it with The Hunger Games, Twilight, Divergent and even Harry Potter, and now it's the turn of John Green's book The Fault in Our Stars. As the movie starts to hit the big screens all over the world, what are you most worried and excited about? What might be done well or (sharp intake of breath) even better than the book? Or will it be a cheese-filled flop? We asked mega fans of the book, all members of the Guardian children's books site, to share their dreams and nightmares as this much treasured novel is turned into a film…

OrliTheBookworm
I trust John Green. I trust him to break my heart, to make me laugh and to leave me wanting more. Therefore if John Green says the movie adaptation of TFIOS is good (as he has repeatedly done), I trust him with that too. For that reason, I'm more worried about humiliating myself by the wailing tears I know will be running down my cheeks the whole way through, than if I'll like the movie or not – of course, I'm terrified it will ruin the book for me and millions of others, but the book is such a classic, I don't think anyone or anything could possibly ruin it. Plus, it has Ansel Elgort in it, so it can't go too wrong. Hopefully. Okay? Okay.

Becca.E
I am very excited to see it. I am glad to have seen John Green involved in the production of it and also the cast looks very promising. I hope that the film isn't over dramatised and made out to be even more upsetting that the book – I struggled enough with the book! The soundtrack is really good – not much to judge a book by but gives you an idea of the feel of it. The trailer got me very excited. I'm trying not to get too excited about it so it's not a let down but I'm dying to see it. I have high hopes for it.

Matilda Wormwood
I hope the film doesn't stray from the book too far… I want to have my heart broken, and my heart can only be broken in certain ways… KhadijaH10
After hearing that The Fault in Our Stars was becoming a film, I became secretly very excited. I generally pride myself on reading classical literature, and nonfiction, not what I previously regarded as a "romcom" book. However, upon reading it, I realized that John Green's masterpiece is far more than a teenage love story. It's funny, it's frank, and it's heart wrenching. I hope that the film adaptation really captures Green's brilliant work, and shows how it's different from the generic romance novel. I am worried, though, that the movie might fall into the sappy love story rut, which is so much less than the novel. I don't want a happily ever after ending, I want something that makes me leave the cinema in tears, that gives me a whole new perspective on teenage love and tragedy. I want to laugh, too, even if it is through tears. I have high hopes for this film, that it will convey the unique voice of John Green that so many teens have fallen in love with.

Nic
I am feeling surprisingly positive about the forthcoming film adaptation of The Fault in Our Stars. In the videos that John Green posts on Vlogbrothers John always seems so genuinely pleased with the film that I can't help but believe that it will turn out okay; I trust him and his influence I guess.

KatS
I think the beauty of the book was in the characters, because they're so much more than their cancer, they're like real people we know. So what I'm worried about for the film is that the writing and the actors won't live up to the characters in the book, that the focus on the plot will detract from creating the personalities of the characters we fell in love with the books. And if we don't love the characters, then the ending won't be anywhere near as heartbreaking. However I know that John Green was very involved in the production of the film, so I have hope that he will have helped make the film just as good as the book.

StarryKnight22
My expectations are that the film is going to be an emotional roller coaster! I think that the intricate elements of the story will be portrayed extremely well and I hope that some of the metaphors are not overlooked. But all in all I can't wait, even if it means taking a whole box of tissues!

Jessica38
Where do I begin I am the biggest TFIOS fan ever!!!! I think that overall the film will be amazing but I think that they might make Gus' death a bit more exaggerated than it is in the book. Also they have got the wrong colour hair for Isaac which is annoying me but anyway. I am really happy with the people they have chosen to play Hazel and Gus because I think they will work really well together. Love it soooooo much!!!:)))))) ;(

Gunny's-girl
I'm sceptic. Films are almost always a disappointment. I'm sure there are a few examples but they're rare. I was massively disappointed by the film adaptation of The Hunger Games, although admittedly Catching Fire was much better. I'm not sure a film about books has quite the same impact as a book about books.

TheBookThief
I'm going to try and explain to you why I'm scared for the movie adaptation of the phenomena which is the novel The Fault in Our Stars. Well, to start off with – as Marshall McLuhan once said- "the medium is the message". As a book, there's no denying the brilliance of The Fault in Our Stars… but as movie?
How is the heartbreak, the intensity, the excruciating pain going to translate onto the big screen? Will it be able to? I'm worried that the beauty of TFIOS lay purely in how John Green wrote it, that the delicacy and poignant messages were due to his style, not due to the content of the book. Without his writing, the plot which could have been mistaken for any young adult book – but the lines which are quoted all over the internet are due to the way Green painted pictures of Hazel and Gus, due to his inimitable tone. WHAT IF THE MOVIE RUINS IT?!?!
When you adapt something from the screen, the fans always insist as much of the plot and original writing is retained as possible – it makes the movie seem authentic. Green knows this, and he spent a large amount of time on set when TFIOS was being filmed. I believe, along with many others, that his input and advice, along with the acting of Shailene Woodley and Ansel Elgort are going to make this movie an incredible experience for his fans. And yet, who knows how it will be for those who haven't read the book? I adore TFIOS but it's a painful love because I need the movie to be perfect and not ruin anything.

Manathebookaholic
It's an amazing book and I hope that the movie inspires people just as the book did. I've recently seen the metaphor clip from the film and it was just as I imagined it! Also, I'm glad that the quotes from the book are being used, it just gives the film the whole book-to-screen feeling. In conclusion I'm definitely looking forward to watching the film especially since Shailene Woodley and Ansel Elgort are acting in it!

Noggin
I am hoping that the film will portray the characters in the right way, that the actors' personalities don't mess everything up! I think that the film may not be as subtle as the book either. However, I am still looking forward to it!

Tashtastic12
I think that the characters will be done well. I think they'll have good chemistry and will be very believable. I hope some of the scenes don't go cheesy as they're quite romantic, but I doubt they would – I think they'd be executed well. Overall I think the movie will be done incredibly well and that it will be a perfect companion to the book.

Ayesha
When the trailer for the movie came out, I could barely hold back my excitement because it was exactly like how the book had described it. I had heard of Shailene Woodley before and had watched the new movie Divergent (also one of my favourite books) which stars Woodley as the main character. I just loved her acting skills and I love that she was chosen to play Hazel in The Fault In Our Stars movie. Ansel Elgort is also in Divergent and he is also exactly like how Augustus is described in the book. His witty personality and flirtatious behaviour towards Hazel that is shown in the trailer begins to really bring the book alive, which is one if the main reason why I'm so excited to watch the movie. I wonder if the movie will also make me cry as much as the book did. I have never actually been this excited to watch a movie before and I am really looking forward to it.

Emybot
TFIOS was my favourite book of 2013 and John Green is my favourite author of all time so I'm both very excited and very nervous for the film. I'm also not quite sure how I feel about sobbing in the middle of the cinema. The film has brought lots of new fans to the "nerdfighter" community and I'm first and foremost very proud and pleased that John has had this opportunity and I really enjoyed being with him through every step of the process, I hope that the film is faithful to the book but I'm slightly worried about how the quotes will translate from being said in my head to being said on the big screen and I'm hoping they don't end up sounding like a cheesy pile of glump. The messages from the book really need to be heard and I hope that more people become aware that illness is not the defining character of a person. I'm super, super excited to see it although will probably have to bring an entire store of tissues *eeek* DFTBA.

Lauren
I'm feeling really excited about the film, but also a bit like I don't want to build my hopes up, as the book had such a special feeling as you read it, I don't know if they'll be able to capture it in a film.

Safah
TFIOS TFIOS, where do I begin? This book is easily one of my favourite novels of all time, the writing, characters and plot were flawless. The dialogue was witty and the meanings in every line, page and chapter? I still find myself opening to a random page and discovering a new hidden message between the lines. Which is why the film adaptation is so exciting and yet absolutely terrifying. While the idea of reliving such a beautiful story in motion picture is thrilling, the fear that it will all go wrong is awful. The trailers and excerpt clips look amazing though, and I can already feel all the emotions! I think my only fear is that the story might focus too much on the romance of Hazel Grace rather than the journey that romance led to. Still, I'm sure it will be amazing and I can't wait!

Infernalpanemallegiance
Although I'm more than sure the movie adaptation will be extremely heartbreaking, as I've heard from people who have been to Little Infinities screenings, I'm also hoping it will be an accurate adaptation. In my opinion, Shailene and Ansel are really great actors and I'm really looking forward to seeing them in TFIOS. If John Green is pleased with the film, I'm sure I would be as well! As with all book to movie adaptations, I fear that some scenes will be missed out. But overall I'm expecting this movie to be amazing!

ShazzSharingan
I cannot wait to see the movie adaptation! I've been following any updates on the movie very closely and so I know that John Green himself plays a huge role in the bringing the movie to life, so I have very high expectations. Given that the author himself has said that the film is true to the book, I think we can assume that the movie is very well done. From the trailers, I can tell that Ansel Elgort and Shailene Woodley have really good chemistry together and so I have firm faith that they'll work wonders on screen. At first when the actor of Augustus was announced, I realized that he did not have blue eyes as described in the book. This may seem like a minor thing, but to me who had a picture of him already visualized in my head, I felt a little disappointed. There were so many connotations to do with his eyes in the books, I felt like some of the magic was being taken away. However, since John Green chose the cast, I decided to put my firm faith in his decision and now after watching the trailers and sneak peaks, I can definitely say I was not disappointed! Ansel Elgort might not have the physical appearance completely down, however, the little quirks that make Augustus such a lovable character (like his smirks) is what makes him shine.
So far, the movie seems just as magical as I imagined inside my head. I am a little worried however, that some of my favourite scenes will not be included in the movie due to the lack of time. But this is something every fangirl and fanboy have to deal with when their favourite books get turned into movie (*cough*Harry Potter*cough*). No matter how hard you try, you cannot possibly include every detail from the book and so even if some parts have been cut out, I'll still be pleased as long as the movie manages to capture the main message of the book. The only thing making me even a little reluctant to watch the movie are the waterworks that are surely to erupt afterwards. But hopefully, everyone around me will be crying just as much and so we'll be happily sharing a box of tissues.

CaraErica
The Fault in our Stars is a literary masterpiece and how can the film adaptation compete? Well, for me, the voice of Hazel was the true winner in this enchanting story. Her voice is warm, witty and tragically truthful, as she shares with us her life, her love and the fault, not in ourselves, but in our stars. With the upcoming film adaptation I'm worried that the voice of Hazel may be lost and with this her unique perspective on the world. However, Shailene Woodley who is to play Hazel Grace is a fantastic actress, who I'm sure she will keep Hazel's emotions raw. Despite this, I still have doubts that the narration within the film will not live up to Green's words. How can they possibly fit all the content of the book into 125 minutes? I'm afraid of what they may cut out and what they'll miss by doing so. What if they miss out dinner with the Waters, what if they miss out the Amsterdam kiss in the Anne Frank museum, what if… There are so many scenes key to the story that could be the difference between a mediocre film and a masterpiece. Another of my fears for the film adaptation is that the characters will be a disappointment. Will Peter Van Houten be quite so annoying and can Gus possibly be as adorable? Part of me wants to fall in love with Ansel Elgort's portrayal of Gus, yet my other half argues he can't possibly be the same as the one I imagined. Nevertheless, The Fault in our Stars film is sure to be a tearjerker and, although I am not convinced it can live up to the book, I hope they can prove my doubts wrong and more…

Joel
As a book reader it's always easy to say the book is better than the film, and that's because we all have different imaginations and we create characters in our own heads – and a director, who as an individual has his own imagination, can never quite rival our own thoughts and expression. There are intense moments, sad moments and funny moments which in our minds are delivered in our own peculiar and particular way. So while I want the director to have the exact delivery and expression of every line in the book that I imagined in my head, I have to accept that it's not going to happen. What I really hope for is that the director doesn't leave any important (or important to me) sections of the novel out of the film, arguing that they wouldn't transfer well to screen.

Scoutingforbooks
I expect the film to be a disappointment for me and all of us TFIOUS fans because we already have our own ideas of what the film is going to be like and that is why I feel were all going to be critical of the film. Bu I don't think the film in itself is going to be that bad. I feel its going to be like the Perks of Being a Wallflower, quirky and indie, a good watch but not the most amazing film. The trailer was actually amazing, though this has been the case with many bad movies. I'm not so sure of the casting choice of Ansel Elgort, he doesn't seem as charming and aloof as Augustus but when we all go and see the film is when we will find out the truth of the casting and how great it us.

ItWasLovelyReadingYou
From what I've heard, the film is true to the book and if John Green is happy with the how it turned out, I'm hoping I shouldn't be too worried! I'm super, super excited to see how the plot pans out (slightly nervous over what will be cut), and a little dubious over the relationship between Ansel and Shailene. I've watched the trailer and all the little clips that crop up every now and then but every time there is a romantic moment I cringe, AND THAT IS NOT SUPPOSED TO HAPPEN. It's meant to be like the book – where my reaction is to melt into a puddle on the floor! So, yes, *slightly* scared but ultimately very very excited indeed! I've re-re-read the book in preparation (which now I come to think of it, wasn't a very good idea as I'll notice immediately when a scene has been cut…)

Spruzie
The thing I'm mostly hoping that the film will be able to portray is how much we love the characters - and therefore how awfully sad the ending is. I can't wait to see it though, and I am sure Shailene and Ansel will be brilliant as Hazel and Gus, they look very similar to how I pictured the characters to be. Other than that, I am praying that John Green does a Stan Lee and appears as a cameo in the background (in the crowds or something) because that would just make my day!

Wow. Thanks to everyone who shared their thoughts! Let's just say expectations are running somewhat high! Do share your thoughts on what you think TFIOS is going to be like on our Teen books FaceBook page or on Twitter @GdnChildrensBks or you can email us childrens.books@theguardian.com. And hope the film is good for you. Here's the Guardian's first look review.