Margaret O'Hara / Knowles
Shawn O'Hara
Ted Knowles
Mrs. Charles S. Howard
George Carson
Charles S. Howard
Thomas Milford
Race Commentator
Walkin' Murphy, Milford's Boy
Himself (archive footage)
Seabiscuit (close-ups)
Wong the O'Hara's Cook
Miss Finch
Libby
