Shirley Temple

Margaret O'Hara / Knowles

Barry Fitzgerald

Shawn O'Hara

Lon McCallister

Ted Knowles

Rosemary DeCamp

Mrs. Charles S. Howard

Donald MacBride

George Carson

Pierre Watkin

Charles S. Howard

William Forrest

Thomas Milford

Hal J. Moore

Race Commentator

Clem McCarthy

Race Commentator

Sugarfoot Anderson

Walkin' Murphy, Milford's Boy

Seabiscuit

Himself (archive footage)

Sea Sovereign

Seabiscuit (close-ups)

War Admiral

Himself (archive footage)

Joe Wong

Wong the O'Hara's Cook

Ezelle Poule

Miss Finch

Joe Hernandez

Race Commentator

Madame Sul-Te-Wan

Libby

Dee Carroll

Alice Talbot - Nurse (uncredited)