Big Boy is a 1925 musical written by Harold R. Atteridge, music by James F. Hanley and Joseph Meyer, and lyrics by Buddy DeSylva. The show featured Al Jolson as Gus, a downtrodden African-American stable boy who ends up as a jockey winning the Kentucky Derby. The all but one-man show was turned into Big Boy (film) in 1930.
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Big Boy (musical) Wikipedia(Text) CC BY-SA