James Stewart as Glenn Miller

June Allyson as Helen Burger Miller

Harry Morgan as Chummy MacGregor

Charles Drake as Don Haynes

George Tobias as Si Schribman

Barton MacLane as General Arnold

Sig Ruman as W. Kranz

Irving Bacon as Mr. Miller

James Bell as Mr. Burger

Kathleen Lockhart as Mrs. Miller

Katherine Warren as Mrs. Burger

Frances Langford as Frances Langford

Louis Armstrong as Louis Armstrong

Ben Pollack as Ben Pollack

Gene Krupa as Gene Krupa

The Modernaires as

The Archie Savage Dancers as

Barney Bigard as Barney Bigard

James Young as James Young

Marty Napoleon as Marty Napoleon

Arvell Shaw as Arvell Shaw

Cozy Cole as Cozy Cole

Babe Russin as Babe Russin

The Airmen of Note as The Glenn Miller Band (uncredited)

Cicely Carter as Bobbysoxer (uncredited)

William Challee as Dispatch Desk Sergeant (uncredited)

Ray Conniff as Trombonist in Glenn Miller Band (uncredited)

Kevin Corcoran as Steve Miller - Age 4 (uncredited)

Hal K. Dawson as Used Car Salesman (uncredited)

Ken DuMain as Club Patron (uncredited)

Bonnie Eddy as Irene Miller (uncredited)

Doris Fulton as Dancer (uncredited)

Phil Garris as Joe Becker (uncredited)

Lisa Gaye as Bobbysoxer (uncredited)

Bob Hamlin as The Mellowmen (uncredited)

Lionel Hampton as Band Member (uncredited)

Ruth Hampton as Young Singer (uncredited)

Harry Harvey as Doctor (uncredited)

Rolan Jones as Waiter (uncredited)

Paula Kelly as Singer (uncredited)

Bill Lee as The Mellowmen (uncredited)

Caryl Lincoln as Commuter (uncredited)

Dayton Lummis as Col. Spaulding, USAAF (uncredited)

Thomas Martin as Elevator Boy (uncredited)

Hans Moebus as Elevator Passenger (uncredited)

Leo Mostovoy as Dr. Schillinger (uncredited)

Forbes Murray as Elevator Passenger (uncredited)

Damian O'Flynn as Col. Baker (uncredited)

Steve Pendleton as Lt. Col. Bassell (uncredited)

Thurl Ravenscroft as The Mellowmen (uncredited)

Davis Roberts as Black Man (uncredited)

Marion Ross as Polly Haynes (uncredited)

Dick Ryan as Auto Garage Repairman (uncredited)

Max Smith as The Mellowmen (uncredited)

Anthony Sydes as Herbert Miller (uncredited)

Deborah Sydes as Joanne Dee Miller (uncredited)

Paul Tanner as Trombonist in Glenn Miller Band (uncredited)

Nino Tempo as Wilber Schwartz (uncredited)

Maxie Thrower as Waiter (uncredited)

Carl Vernell as Musician Technician (uncredited)

Carleton Young as Adjunct General (uncredited)