Cary Grant as Tom Winters

Sophia Loren as Cinzia Zaccardi

Martha Hyer as Carolyn Gibson

Harry Guardino as Angelo Donatello

Eduardo Ciannelli as Arturo Zaccardi

Murray Hamilton as Capt. Alan Wilson

Mimi Gibson as Elizabeth Winters

Paul Petersen as David Winters

Charles Herbert as Robert Winters

Werner Klemperer as Harold Messner

Madge Kennedy as Mrs. Farnsworth

John Litel as Mr. William Farnsworth

Bess Flowers as Wedding Guest

Kathleen Freeman as Laundromat Gossip

Marc Wilder as Specialty Dancer (uncredited)

Ralph Brooks as Country Club Patron (uncredited)

Beulah Christian as Country Club Patron (uncredited)

Oliver Cross as Country Club Patron (uncredited)

Roy Damron as Country Club Patron (uncredited)

Kenneth Gibson as Country Club Patron (uncredited)

James Gonzalez as Country Club Patron (uncredited)

Kenner G. Kemp as Country Club Patron (uncredited)

Perk Lazelle as Country Club Patron (uncredited)

William Meader as Country Club Patron (uncredited)

Harold Miller as Country Club Patron / Wedding Guest (uncredited)

Hans Moebus as Country Club Patron (uncredited)

Tom Ferrandini as Country Club Patron (uncredited)

Bess Flowers as Country Club Patron (uncredited)

Norman Stevans as Country Club Patron (uncredited)

Murray Pollack as Country Club Patron (uncredited)

Jeffrey Sayre as Country Club Patron (uncredited)

José Portugal as Country Club Patron (uncredited)

Ruby Scrivo as Dancer (uncredited)

Lennie Smith as Dancer (uncredited)

Scott Brady as Dancer (non crédité)

Nikki Faustino Brady as Dancer (non crédité)

Tony Rosa as Dancer (uncredited)

Joe Lanza as Dancer (uncredited)

Jack Chefe as Country Club Waiter (uncredited)

Joe Evans as Waiter (uncredited)

Paul Ravel as Carnival Patron (uncredited)

Herman Belmonte as Carnival Patron (uncredited)

Wally Walker as Pitchman (uncredited)

Brooks Benedict as Pitchman (uncredited)

Joe McTurk as Pitchman (uncredited)

Helen Brown as Woman in Laundromat (uncredited)

Peggy Connelly as Eleanor Wilson (uncredited)

Stewart East as Police Officer (uncredited)

Kathleen Freeman as Laundromat Gossip (uncredited)

Bill Hickman as Handsome Man (uncredited)

Florence MacAfee as Laundromat Attendant (uncredited)

Philo McCullough as Carnival Patron (uncredited)

Mabel Smaney as Carnival Patron (uncredited)

Pat Moran as Mabel Smaney (uncredited)

Pat Moran as A Party Guest (uncredited)

Bert Stevens as A Party Guest (uncredited)

Bobby Gilbert as A Party Guest (uncredited)

Jack Deery as A Party Guest (uncredited)

Ernst Brengt as French Diplomat (uncredited)

Julian Rivero as Spanish Diplomat (uncredited)

Mary Forbes as British Society Woman (uncredited)

William Remick as Justice of the Peace (uncredited)

Edwin Rochelle as Caterer (uncredited)

Barbara Steele as Minor Role (uncredited)

Larry Carr as Minor Role (uncredited)