VIDEO : Tyler Perry Joins Cast of 'Brain on Fire'

Tyler Perry is joining the cast of Gerard Barrett?s Brain on Fire, based on Susannah Cahalan?s best-selling memoir Brain on Fire: My Month of Madness. The film, currently shooting in Vancouver, stars Chloe Grace Moretz as Cahalan, a journalist at the New York Post who suddenly began experiencing hallucinations and paranoia. Perry will play Cahalan?s boss at the newspaper. The cast also features Thomas Mann, Jenny Slate, Richard Armitage and Carrie-Anne Moss. Perry last appeared on film in Gone Girl.