Danny Kaye as Hobart Frisbee

Virginia Mayo as Honey Swanson

Benny Goodman as Professor Magenbruch

Tommy Dorsey as Tommy Dorsey

Louis Armstrong as Louis Armstrong

Lionel Hampton as Lionel Hampton

Charlie Barnet as Charlie Barnet

Mel Powell as Mel Powell

Ford Washington Lee as Buck

John 'Bubbles' Sublett as Bubbles

Page Cavanaugh as Page Cavanaugh

Al Viola as Al Viola

Lloyd Pratt as Lloyd Pratt

Orlandus Wilson as Orlandus Wilson

Henry Owens as Henry Owens

Willie Johnson as Willie Johnson

Clyde Riddick as Clyde Riddick

Russo do Pandeiro as Russo

Hugh Herbert as Professor Twingle

Steve Cochran as Tony Crow

J. Edward Bromberg as Dr. Elfini

Felix Bressart as Professor Gerkikoff

Ludwig Stössel as Professor Träumer

O.Z. Whitehead as Professor Oddly

Esther Dale as Miss Bragg

Mary Field as Miss Totten

Howland Chamberlain as Mr. Setter

Paul Langton as Joe

Sidney Blackmer as Adams

Ben Welden as Monte

Ben Chasen as Ben

Peter Virgo as Louis

Harry Babasin as Bass

Louie Bellson as Drums

Alton Hendrickson as Guitar

Laurindo Almeida as Laurindo Almeida (uncredited)

Sue George as Cigarette Girl (uncredited)

Milicent Patrick as Woman at Dorsey Club (uncredited)