Freddie Highmore

as August Rush

Keri Russell

as Lyla Novacek

Jonathan Rhys Meyers

as Louis Connelly

Terrence Howard

as Richard Jeffries

Robin Williams

as Maxwell "Wizard" Wallace

William Sadler

as Thomas Novacek

Marian Seldes

as The Dean

Mykelti Williamson

as Reverend James

Leon Thomas III

as Arthur

Aaron Staton

as Nick

Alex O'Loughlin

as Marshall

Jamia Simone Nash

as Hope

Ronald Guttman

as Professor

Bonnie McKee

as Lizzy

Michael Drayer

as Mannix

Jamie O'Keeffe

as Steve

Becki Newton

as Jennifer

Tyler McGuckin

as Peter

Megan Gallagher

as Megan

Anais Martinez

as Backbeat

Bilal Bishop

as Roller Bull

Michael R. Hammonds II

as Feedback

Timmy Mitchum

as Joey

Henry Caplan

as Bill

John Knox

as Club Manager

Amy V. Dewhurst

as Receptionist

Victor Verhaeghe

as Cop

Darrie Lawrence

as Old Neighbor

Sean Haberle

as Frank

Jamal Joseph

as Driver

Robert Aberdeen

as Record Executive

Georgia Creighton

as Apartment Owner

Joshua Jaymz Doss

as Orphanage Kid

Craig Johnson

as Orphanage Boy

Dominic Colón

as Policeman

Zach Page

as Child Guitar Player

Charles Mack

as Gospel Soloist

Amma Agyapon

as Gospel Singer

Adia Beckford

as Gospel Singer

Dietrice A. Bolden

as Gospel Singer

Dina Gardener

as Gospel Singer

Luther Isler

as Gospel Singer

Raymond Johnson

as Gospel Singer

Joyce Walker Joseph

as Gospel Singer

Willana Mack

as Gospel Singer

Lamar Antwon Robinson

as Gospel Singer

Talif Showers

as Gospel Singer

Carlton Taylor

as Gospel Singer

Yvette Bodrick

as Street Sound Circle

Crystal A. Elliott

as Street Sound Circle

Jindai Joseph

as Street Sound Circle

Jacquelen Singleton

as Street Sound Circle

Travis Veada

as Street Sound Circle

Jasmine Pauline Wigfall

as Street Sound Circle

John Farrer

as Violinist (uncredited)

Paul Thornton

as Alcoholic (uncredited)