Ben Affleck

Charlie Maguire

Tye Sheridan

JR Maguire

Daniel Ranieri

Young JR Maguire

Lily Rabe

Dorothy Maguire

Christopher Lloyd

Grandpa Maguire

Max Martini

The Voice, JR's father

Rhenzy Feliz

Wesley

Briana Middleton

Sidney

Max Casella

Chief

Sondra James

Grandma Maguire

Michael Braun

Bobo

Matthew Delamater

Joey D

Ivan Leung

Jimmy

Danielle Ranieri

Aunt Ruth

Kate Avallone

Kathy

Mark Boyett

Sidney's Dad

Quincy Tyler Bernstine

Sidney's Mom

Ezra Knight

Professor Van Dyke

David Carl

School Psychologist

Shannon Collis

Pat

Keira Jo Lassor

Kathy's Daughter

Jennifer C. Johnson

Mrs. Williams

Michael Steven Costello

NYT Editor

Kate Middleton

NYT Personnel Woman

Jackson Damon

NYT Copyboy

Caroline Bergwall

NYT Copygirl

Daniel Washington

Officer James

Jenny Eagan

Chief's Wife

Steve Gagliastro

Other Customer

Annabella Valle

Aunt Ruth's Kid #1

Clara Kelly

Aunt Ruth's Kid #2

Meara Mahoney Gross

Aunt Ruth's Kid #3

Ron Livingston

Future JR Maguire (voice only)

Jack Baumrind

Kid in Classroom (uncredited)

Julia Bechler

Dickens Bar Regular (uncredited)

Keith R. Beck

Yale Student (uncredited)

Alissa Bourne

Dickens Bar Patron (uncredited)

Dara Taylor

Original Music Composer

Linda Cohen

Music Supervisor

William Monahan

Screenplay

Tanya Swerling

Editor

Matt Kasmir

Visual Effects Supervisor

Martin Ruhe

Director of Photography

Kalina Ivanov

Production Design

Melissa M. Levander

Set Decoration

Trish Seeney

Makeup Department Head

Bryan Felty

Art Direction

J.R. Moehringer

Executive Producer

Todd Beckett

Sound Re-Recording Mixer

Jon Title

Sound Designer

Dana Pacheco

Costume Supervisor

Nancy Nugent Title

Supervising Sound Editor

Julian Slater

Supervising Sound Editor

J.R. Moehringer

Book

Barbara A. Hall

Executive Producer

Jenny Eagan

Costume Design

Rachel Tenner

Casting

George Clooney

Producer

George Clooney

Director

Grant Heslov

Producer

Ted Hope

Producer