Michael Fassbender as Frank

Domhnall Gleeson as Jon Burroughs

Maggie Gyllenhaal as Clara

Scoot McNairy as Don

François Civil as Baraque

Carla Azar as Nana

Tess Harper as Frank's Mom

Bruce McIntosh as Frank's Dad

Hayley Derryberry as Simone

Lauren Poole as Alice

Moira Brooker as Jon's Mother

Paul Butterworth as Jon's Father

Phil Kingston as Radio DJ

Billie Traynor as Café Lady

Shane O'Brien as Lucas

Chris McHallem as Paramedic

Michael James Ford as Port Official

Mark Huberman as Management Guru

Rosalind Adler as German Mother

Niall Glennon as German Father

Torsten Brescanu as German Child

Leroy Harris as Grocery Boy

Noah Hauser as Passerby Austin 1

Laura Love Tode as Passerby Austin 2

Jordyn Aurora Aquino as Hipster Singer

Katie Anne Mitchell as Interview Girl

Paul Howard Smith as Man in Cowboy Hat

Matthew Page as Passerby in Alleyway

Alex Knight as SXSW Driver

Abe Bueno-Jallad as Stage Manager

Morse Bicknell as Driver

Dean Satriano as Young Man in Chinese Restaurant

Peter Trinh as Chinese Restaurant Waiter

Kevin Wiggins as Hillbilly

Travis Hammer as Tree Surgeon

Kelly V. Lucio as SXSW Concert Attendee (uncredited)