There are a couple of YA books that are being made into movies and even a TV series (Delirium).
Liana Liberato is rumoured to have clinched the lead role as Hazel.
Actually, she does kinda look like Hazel when being compared to this fan art.
Shailene Woodley is also rumored to be part of this movie.
While the love interest, Four/ Tobias, is Theo James.
Tris' brother, Cale, is played by Ansel Elgort.
Maggie Q is going to play as Tori in Divergent.
Zoë Kravitz will be Christina.
Kate Winslet will also have a role.
Daren Kagasoff will play Alex.
Gregg Sulkin will be Julian.
Lucien Laviscount will be Aspen.