- Dick Van Dyke
- William Simon aka Billy Bright
- Michele Lee
- Mary Gibson
- Mickey Rooney
- Martin 'Cockeye' Van Buren
- Cornel Wilde
- Frank Powers
- Nina Wayne
- Sybil Atlas
- Pert Kelton
- Mama Bell
- Steve Allen
- Steve Allen
- Barbara Heller
- Ginger
- Ed Peck
- Edwin G. Englehardt
- Jeannine Riley
- Lorraine Margaret Bell
- Gavin MacLeod
- 1st Director
- Jay Novello
- Miguel
- Craig Huebing
- Doctor
- Paulene Myers
- Phoebe
- Fritz Feld
- Armand
- Jerome Cowan
- Lawrence
- Isabel Sanford
- Woman in Detergent Commercial
- Jeff Donnell
- Nurse
- Carl Reiner
- Al Schilling
- Frank Adamo
- Minor Role
- Lillian Adams
- Old Lady
- Priscilla Ann
- Consuela
- Robert Ball
- Mike Fields
- Rex Benson
- Minor Role
- Mel Berger
- Fatso / Dental Patient (uncredited)
- Jack Berle
- Minor Role
- Frank Biro
- Fred - Director
- Nick Borgani
- Premier Guest
- William Boyce
- Minor Role
- Paul Bradley
- Funeral Guest
- Peter Brocco
- Minister
- Linda Burton
- Minor Role
- Patrick Campbell
- Funeral Director
- Calvin Coolidge
- Self
- Suzanne Covington
- Minor Role
- Billy Curtis
- Lifeguard in Film
- Maurice Dallimore
- Lord Faversham
- Howard Dayton
- Ketchup Man
- Luis Delgado
- Minor Role
- Peter Eastman
- Screening Room Executive
- Joyce Easton
- French Maid
- Geoff Edwards
- Late Night Movie Host
- Lynn Fields
- Mailbox Gag
- Harry Fleer
- Cop
- Paul Frees
- Newsreel Narrator / Commercial Announcer / Man in Restaurant (voice) (uncredited)
- Leonard Frey
- Talk Show Guest
- Sig Frohlich
- Minor Role
- Ben Frommer
- Mexican Barfly
- Dee Gardner
- Minor Role
- Eddie Garrett
- Restaurant Patron
- Bobby Gilbert
- Minor Role
- The Great John L.
- Burly Man
- Clive Halliday
- Butler
- Alvin Hammer
- Cameraman
- Carter Harbaugh
- Tommy
- Andre Hemmers
- Minor Role
- Brick Huston
- Still Photographer
- Scott James
- Billy Jr.
- Stardedt Kaava
- Minor Role
- Lou Kane
- Storekeeper
- Suzie Kaye
- Amanda Lou Phipps
- Kenner G. Kemp
- Theatre Doorman
- Walter Kightly
- Minor Role
- Joseph La Cava
- Restaurant Patron
- Ethelreda Leopold
- Restaurant Patron
- Marilyn Malloy
- Nurse
- Alan Marston
- Restaurant Patron
- Frank Mathias
- Hearse Driver
- Kres Mersky
- Bathing Beauty
- Celeste Michaels
- Girl in Mini-Skirt
- Mantan Moreland
- Passerby at Billy's Funeral
- Howard Morris
- Pedestrian Gag Man in Love Honor and Oh Boy
- Ottola Nesmith
- Housekeeper
- William H. O'Brien
- Funeral Guest
- Angel Pine
- Minor Role
- Murray Pollack
- Wedding Guest
- Ward Ramsey
- Officer
- Bob Rhodes
- Cameraman
- Christopher Ross
- Musician
- Mark Russell
- Minor Role
- Paul Russell
- Funeral Guest
- Cosmo Sardo
- Pall Bearer at Funeral
- Joe Sawyers
- Driver
- Jeffrey Sayre
- Pall Bearer at Funeral
- Johnny Silver
- Little Man
- Ralph Smiley
- Hot Dog Man
- Irene Tedrow
- Billy's Mother in Forget Me Not
- Viki Vigen
- Little Girl
- Johnny Weissmuller
- Jungle Jim
- Jean Willes
- Denise in film clip
- Dick Winslow
- Organist
- Bill Zuckert
- Prison Warden in Film
