Danny Kaye
Professor Hobart Frisbee
Virginia Mayo
Honey Swanson
Benny Goodman
Professor Magenbruch
Tommy Dorsey
Tommy Dorsey
Louis Armstrong
Louis Armstrong
Lionel Hampton
Lionel Hampton
Charlie Barnet
Charlie Barnet
Mel Powell
Mel Powell
Laurindo Almeida
Laurindo Almeida
Ford Washington Lee
Buck
Hugh Herbert
Professor Twingle
Steve Cochran
Tony Crow
J. Edward Bromberg
Dr. Elfini
Felix Bressart
Professor Gerkikoff
Ludwig Stössel
Professor Traumer
O. Z. Whitehead
Professor Oddly
Esther Dale
Miss Bragg
Mary Field
Miss Totten
Howland Chamberlain
Mr. Setter
Paul Langton
Joe
Sidney Blackmer
Adams
Ben Welden
Monte
Ben Chasen
Ben
Peter Virgo
Louis
Harry Babasin
Bass
Louie Bellson
Drums
Alton Hendrickson
Guitar
Sue George
Cigarette Girl (uncredited)
Milicent Patrick
Woman at Dorsey Club (uncredited)