Dear Evan Hansen tells the story of a socially anxious high school student, paralyzed by the hyper-connectivity of social media and forced to watch the world from the outside looking in. Trying to improve his self-image, Evan writes himself a letter that is mistaken for a classmate's suicide note — and rides that error to popularity.
Platt, 27, starred as Evan Hansen in the original Broadway run, earning him the Tony Award for lead actor in a musical in 2017. Dever, 24, plays Zoe, Evan's love interest and the younger sister of his late classmate.
Amandla Stenberg, Julianne Moore and Amy Adams also star in the film.
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Speaking to PEOPLE Now in early 2020, Platt said he "would love to go back" to his role as Evan for the movie, adding that he hopes the Dear Evan Hansen adaptation will be a "new thing."
"A lot of times when you're taking something from stage to screen there can be almost too much faithfulness to the stage piece out of respect for fans or for people that love the material," he said in March. "What's important for people to understand is the film is such a different piece. I think not being afraid to reinvent it for the screen would be the thing that would make or break it."