Kaitlyn Dever cast in new take on Romeo & Juliet Kaitlyn Dever is reportedly in talks to star in Rosaline, a comedic and revisionist take on Romeo & Juliet. Share Via Email | A+A A- By Express News Service Kaitlyn Dever, best known for her roles in Booksmart, Unbelievable, and Them That Follow, is reportedly in talks to star in Rosaline, a comedic and revisionist take on Romeo & Juliet. Based on the novel When You Were Mine by Rebecca Serle, 20th Century Studios has acquired the rights for the film. A modern twist on the classic tale of Romeo and Juliet, the novel sees “the most famous love story ever told” through the eyes of Juliet’s cousin Rosaline, a sharp but idealistic young woman — who also happens to be Romeo’s recent ex-girlfriend.