- Ethel Merman
- Molly Donahue
- Donald O'Connor
- Tim Donahue
- Marilyn Monroe
- Vicky Parker
- Dan Dailey
- Terry Donahue
- Johnnie Ray
- Steve Donahue
- Mitzi Gaynor
- Katy Donahue
- Richard Eastham
- Lew Harris
- Hugh O'Brian
- Charles Gibbs
- Frank McHugh
- Eddie Dugan
- Rhys Williams
- Father Dineen
- Lee Patrick
- Marge
- Eve Miller
- Hatcheck Girl
- Robin Raymond
- Lillian Sawyer
- Dorothy Abbott
- Showgirl
- Dorothy Adams
- Nurse
- Robert Adler
- Night Watchman
- Aladdin
- Orchestra Violinist
- Fred Aldrich
- Private Detective
- Charlotte Austin
- Lorna
- Jimmy Baird
- Steve - Age 6
- Paul Bradley
- Nightclub Patron
- Tex Brodus
- Dancer
- Jimmy Brooks
- Dancer
- Ralph Brooks
- Party Guest
- George Chakiris
- Dancer
- Chick Chandler
- Harry
- Billy Chapin
- Steve - Age 10
- Jack Chefe
- Nightclub Patron
- Beulah Christian
- Woman in Church
- Les Clark
- Member of Greenwich Village Trio
- Carmen Clifford
- (uncredited)
- Jack Colton
- Dancer
- James Conaty
- Party Guest
- Carole Conn
- Woman
- Alan S. Craig
- Dancer
- Paul Cristo
- Nightclub Patron
- Gene Dailey
- Dancer
- Drusilla Davis
- Dancer
- Frank Dernhammer
- Dancer
- John Doucette
- Stage Manager
- Robert Dulaine
- Man
- Elaine DuPont
- (uncredited)
- Isabelle Dwan
- Sophie Tucker
- Ward Ellis
- Member of Greenwich Village Trio
- Ernie Flatt
- Member of Greenwich Village Trio
- Bess Flowers
- Party Guest
- Dominic Frontiere
- Musician
- Donald Gamble
- Young Tim
- Kenneth Gibson
- Party Guest
- Mimi Gibson
- Katy - Age 4
- Paul Glass
- Trombonist
- James Gonzalez
- Party Guest
- Gavin Gordon
- Geoffrey
- Alex Goudovitch
- Dancer
- Stanley Hall
- Dancer with Vicky
- Stuart Hall
- Party Guest
- Chuck Hamilton
- Policeman
- Jimmie Horan
- Club Patron
- Kenner G. Kemp
- Man Talking to Sophie
- Doris Kemper
- Lottie
- Colin Kenny
- Priest on Altar
- Donald Kerr
- Bobby Clark
- Linda Lowell
- Katy - Age 8
- Herb Lurie
- Dancer
- Wilbur Mack
- Booking Agent
- Jimmie Maddin
- Bandleader
- Alan Marston
- Radio Station Clerk
- Thomas Martin
- Gallagher's Roof Waiter
- Matt Mattox
- Dancer
- George Melford
- Kelly
- Buzz Miller
- Dancer
- Harold Miller
- Party Guest
- Alvy Moore
- Katy's Date
- Duke Morgan
- Musician
- Dick Nordt
- Dancer
- Barry Norton
- Nightclub Patron
- Ron Nyman
- Tattooed Sailor
- Eddie Oliver
- Bandleader
- Roy Palmer
- Dancer
- Howard Parker
- Dancer
- Joseph Paz
- Dancer
- Jack Perrin
- Private Detective
- Hamil Petroff
- Dancer
- Murray Pollack
- Party Guest
- Paul Power
- Man in Church
- Louis Quinn
- Cabbie
- Fred Rapport
- Gallagher's Roof Headwaiter
- Leoda Richards
- Restaurant Patron
- Dick Ryan
- Dancer
- Bernard Sell
- Nightclub Patron
- Henry Slate
- Dance Director
- Sandra Spence
- Girl at Railroad Station
- Mary Stewart
- Funhouse Witch
- Hal Taggart
- Booking Agent
- Lyle Talbot
- Stage Manager
- Charles Tannen
- EmCee / Orchestra Leader (voice) (uncredited)
- Rodger Terry
- Nightclub Patron
- Tommy Walker
- (uncredited)
- Ray Weamer
- Dancer
- Walter Winchell
- Walter Winchell
