Hobart Frisbee
Honey Swanson
Professor Magenbruch
Tommy Dorsey
Louis Armstrong
Lionel Hampton
Charlie Barnet
Mel Powell
Buck
Bubbles
Page Cavanaugh
Al Viola
Lloyd Pratt
Orlandus Wilson
Henry Owens
Willie Johnson
Clyde Riddick
Russo
Professor Twingle
Tony Crow
Dr. Elfini
Professor Gerkikoff
Professor Träumer
Professor Oddly
Miss Bragg
Miss Totten
Mr. Setter
Joe
Adams
Monte
Ben
Louis
Bass
Drums
Guitar
Laurindo Almeida (uncredited)
Cigarette Girl (uncredited)
Woman at Dorsey Club (uncredited)