What If

Daniel Radcliffe

Wallace

Zoe Kazan

Chantry

Megan Park

Dalia

Adam Driver

Allan

Mackenzie Davis

Nicole

Rafe Spall

Ben

Lucius Hoyos

Felix

Jemima Rooper

Ellie

Tommie-Amber Pirie

Gretchen

Meghan Heffern

Tabby

Jonathan Cherry

Josh

Rebecca Northan

Holly

Jordan Hayes

Becky

Oona Chaplin

Julianne

Adam Fergus

Rolf