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)