James Stewart (Glenn Miller)
June Allyson (Helen Burger Miller)
Charles Drake (Don Haynes)
George Tobias (Si Schribman)
Henry Morgan (Chummy MacGregor)
Anthony Sydes (Herbert)
Dick Ryan (Garage Man)
Sig Rumann (Mr. Kranz)
Gaylord "Steve" Pendleton (Lt. Col. Baessell)
Damian O'Flynn (Col. Baker)
Nino Tempo (Wilbur Schwartz)
Carleton Young (Adjutant General)
Trummy Young (Trombone)
Bonnie Kay Eddy (Irene)
Carl Vernell (Music Cutter)
Robert Davis (Boy)
Paula Kelly (Uncredited)
Marty Napoleon (Piano)
Leo Mostovoy (Schillinger)
Barney Bigard (Clarinet)
William Challee (Sergeant)
Cozy Cole (Drums)
Hal K. Dawson (Used Car Salesman)
Lisa Gaye (Bobby-Soxer)
Ruth Hampton (Girl Singer)
Harry Harvey (Doctor)
Archie Savage (Actor/Actress)
The Modernaires (Themselves)
Arvell Shaw (Bass)
Dayton Lummis (Col. Spaulding)
Marion Ross (Polly Haynes)
Irving Bacon (Mr. Miller)
Kathleen Lockhart (Mrs. Miller)
Phil Garris (Joe Becker)
James Bell (Mr. Burger)
Katherine Warren (Mrs. Burger)
Frances Langford (Frances Langford)
Barton MacLane (Gen. Arnold)
Louis Armstrong (Himself)
Gene Krupa (Gene Krupa)
Ben Pollack (Ben Pollack)