Tyrone Power as Martin Maher

Maureen O'Hara as Mary O'Donnell

Robert Francis as James Sundstrom Jr.

Donald Crisp as Old Martin

Ward Bond as Captain Herman Kohler

Betsy Palmer as Kitty Carter

Philip Carey as Chuck Dotson

William Leslie as James "Red" Sundstrom

Harry Carey, Jr. as Dwight D. Eisenhower

Patrick Wayne as Abner "Cherub" Overton

Sean McClory as Dinny Maher

Peter Graves as Corporal Rudolph Heinz

Milburn Stone as Captain John J. Pershing

Erin O'Brien-Moore as Mrs. Koehler

Walter Ehlers as Mike Shannon

Willis Bouchey as Major Thomas

Ken Curtis as Specialty (uncredited)

Tom Hennesy as Cadet Dotson (uncredited)

Martin Milner as Jim O'Carberry (uncredited)

Mickey Simpson as Policeman (uncredited)

Harry Tenbrook as Waiter (uncredited)

Jean Moorhead as Undetermined Secondary Role (uncredited)

Chuck Courtney as Whitey Larson (uncredited)

Robert Ellis as Cadet Short (uncredited)

Ron Nyman as Recruit (uncredited)

Jack Pennick as Recruiting Sergeant (uncredited)

Raoul Freeman as Officer (uncredited)

Dona Cole as Peggy (uncredited)