June Allyson character Jane Witherspoon / Lou Ellen Carter
Lucille Bremer character Sally Hessler
Judy Garland character Marilyn Miller
Kathryn Grayson character Magnolia Hawks / Herself
Van Heflin character James I. Hessler
Lena Horne character Julie LaVerne / Herself
Van Johnson character Bandleader in Elite Club
Tony Martin character Gaylord Ravenal / Himself
Dinah Shore character Una Trance / Herself
Frank Sinatra character Frank Sinatra
Robert Walker character Jerome Kern
Gower Champion character Dance Specialty
Cyd Charisse character Dance Specialty
Harry Hayden character Charles Frohman
Paul Langton character Oscar Hammerstein II
Angela Lansbury character London Specialty
Paul Maxey character Victor Herbert
Ray McDonald character Dance Specialty / George Budd
Mary Nash character Mrs. Muller
Virginia O'Brien character Ellie May Shipley / Herself
Dorothy Patrick character Eva Kern
Caleb Peterson character Joe (segment "Show Boat")
William Phillips character Joe Hennessey
Joan Wells character Sally Hessler as a Girl
Lyn Wilde character Specialty (segment 'The Cat and the Fiddle')
Lee Wilde character Specialty (segment 'The Cat and the Fiddle')
Bess Flowers character Backstage Well-Wisher (uncredited)
Russell Hicks character Producer (uncredited)
Frank McLure character Stage Door Johnny (uncredited)
Bert Moorhouse character Elite Club Diner (uncredited)
Robert Emmett O'Connor character Ed (uncredited)
Mary Hatcher character Showgirl (uncredited)
'Snub' Pollard character Show Boat Orchestra Drummer (uncredited)
Ray Teal character Movie Studio Orchestra Conductor (uncredited)
Esther Williams character Herself (uncredited)
