Daniel Radcliffe drops out of school (no, not Hogwarts) and begins to fall for a girl who is already in a relationship.

By Pamela Gocobachi
Updated April 21, 2014 at 04:00 AM EDT
What If
Credit: Caitlin Cronenberg

Daniel Radcliffe plays Wallace, a med-school dropout still reeling from a breakup when he meets — and hits it off with — a quirky animator (Zoe Kazan). The hitch? She already has a boyfriend (Rafe Spall). Still, the two build a platonic bond through clever dialogue, which was mostly improvised on set. ”A lot of the movie is our characters making each other laugh, and in those moments, I’d focus on saying whatever I thought would crack Zoe up most,” says Radcliffe. ”Wallace’s sense of humor is closer to my own than any character I’ve played.”