Danny Kaye

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

John 'Bubbles' Sublett

Bubbles

Page Cavanaugh

Page Cavanaugh

Orlandus Wilson

Orlandus Wilson

Hugh Herbert

Professor Twingle

Steve Cochran

Tony Crow

J. Edward Bromberg

Dr. Elfini

Felix Bressart

Professor Gerkikoff

Ludwig Stössel

Professor Träumer

O.Z. Whitehead

Professor Oddly

Esther Dale

Miss Bragg

Howland Chamberlain

Mr. Setter

Paul Langton

Joe

Sidney Blackmer

Adams

Ben Welden

Monte

Peter Virgo

Louis

Louie Bellson

Drums

Laurindo Almeida

Laurindo Almeida (uncredited)

Sue George

Cigarette Girl (uncredited)

Milicent Patrick

Woman at Dorsey Club (uncredited)