Freddie Highmore

August Rush

Keri Russell

Lyla Novacek

Jonathan Rhys Meyers

Louis Connelly

Terrence Howard

Richard Jeffries

Robin Williams

Maxwell "Wizard" Wallace

William Sadler

Thomas Novacek

Marian Seldes

The Dean

Mykelti Williamson

Reverend James

Leon G. Thomas III

Arthur

Aaron Staton

Nick

Alex O'Loughlin

Marshall

Jamia Simone Nash

Hope

Ronald Guttman

Professor

Bonnie McKee

Lizzy

Michael Drayer

Mannix

Becki Newton

Jennifer

Tyler McGuckin

Peter

Timmy Mitchum

Joey

Henry Caplan

Bill

John Knox

Club Manager

Amy V. Dewhurst

Receptionist

Victor Verhaeghe

Cop

Darrie Lawrence

Old Neighbor

Sean Haberle

Frank

Jamal Joseph

Driver

Robert Aberdeen

Record Executive

Georgia Creighton

Apartment Owner

Dominic Colón

Policeman

Zach Page

Child Guitar Player