Sean Penn

Jimmy Markum

Tim Robbins

Dave Boyle

Kevin Bacon

Sean Devine

Laurence Fishburne

Whitey Powers

Marcia Gay Harden

Celeste Boyle

Laura Linney

Annabeth Markum

Kevin Chapman

Val Savage

Tom Guiry

Brendan Harris

Emmy Rossum

Katie Markum

Spencer Treat Clark

Silent Ray Harris

Andrew Mackin

John O'Shea

Adam Nelson

Nick Savage

Robert Wahlberg

Kevin Savage

Jenny O'Hara

Esther Harris

John Doman

Driver

Cameron Bowen

Young Dave

Jason Kelly

Young Jimmy

Connor Paolo

Young Sean

T. Bruce Page

Jimmy's Father

Miles Herter

Sean's Father