Freddie Highmore

Character: August Rush

Keri Russell

Character: Lyla Novacek

Jonathan Rhys Meyers

Character: Louis Connelly

Terrence Howard

Character: Richard Jeffries

Robin Williams

Character: Maxwell "Wizard" Wallace

William Sadler

Character: Thomas Novacek

Marian Seldes

Character: The Dean

Mykelti Williamson

Character: Reverend James

Leon Thomas III

Character: Arthur

Aaron Staton

Character: Nick

Alex O'Loughlin

Character: Marshall

Jamia Simone Nash

Character: Hope

Ronald Guttman

Character: Professor

Bonnie McKee

Character: Lizzy

Michael Drayer

Character: Mannix

Jamie O'Keeffe

Character: Steve

Becki Newton

Character: Jennifer

Tyler McGuckin

Character: Peter

Megan Gallagher

Character: Megan

Anais Martinez

Character: Backbeat

Bilal Bishop

Character: Roller Bull

Michael R. Hammonds II

Character: Feedback

Timmy Mitchum

Character: Joey

Henry Caplan

Character: Bill

John Knox

Character: Club Manager

Amy V. Dewhurst

Character: Receptionist

Victor Verhaeghe

Character: Cop

Darrie Lawrence

Character: Old Neighbor

Sean Haberle

Character: Frank

Jamal Joseph

Character: Driver

Robert Aberdeen

Character: Record Executive

Georgia Creighton

Character: Apartment Owner

Joshua Jaymz Doss

Character: Orphanage Kid

Craig Johnson

Character: Orphanage Boy

Dominic Colón

Character: Policeman

Zach Page

Character: Child Guitar Player

Charles Mack

Character: Gospel Soloist

Amma Agyapon

Character: Gospel Singer

Adia Beckford

Character: Gospel Singer

Dietrice A. Bolden

Character: Gospel Singer

Dina Gardener

Character: Gospel Singer

Luther Isler

Character: Gospel Singer

Raymond Johnson

Character: Gospel Singer

Joyce Walker Joseph

Character: Gospel Singer

Willana Mack

Character: Gospel Singer

Lamar Antwon Robinson

Character: Gospel Singer

Talif Showers

Character: Gospel Singer

Carlton Taylor

Character: Gospel Singer

Yvette Bodrick

Character: Street Sound Circle

Crystal A. Elliott

Character: Street Sound Circle

Jindai Joseph

Character: Street Sound Circle

Jacquelen Singleton

Character: Street Sound Circle

Travis Veada

Character: Street Sound Circle

Jasmine Pauline Wigfall

Character: Street Sound Circle

John Farrer

Character: Violinist (uncredited)