Dick Van Dyke as Billy Bright

Michele Lee as Mary Gibson

Mickey Rooney as Cockeye

Cornel Wilde as Frank Powers

Nina Wayne as Sybil Atlas

Pert Kelton as Mama Bell

Steve Allen as Steve Allen

Barbara Heller as Ginger

Ed Peck as Edwin G. Englehardt

Jeannine Riley as Lorraine Bell

Gavin MacLeod as 1st Director

Jay Novello as Miguel

Craig Huebing as Doctor

Paulene Myers as Phoebe

Fritz Feld as Armand

Jerome Cowan as Lawrence

Isabel Sanford as Woman

Jeff Donnell as Nurse

Carl Reiner as Al Schilling

Howard Dayton as Ketchup Man

Maurice Dallimore as Lord Faversham

Mantan Moreland as Passerby at Billy's Funeral (unbilled)

Frank Adamo as Minor Role (uncredited)

Lillian Adams as Old Lady (uncredited)

Priscilla Ann as Consuela (uncredited)

Robert Ball as Mike Fields (uncredited)

Rex Benson as Minor Role (uncredited)

Mel Berger as Fatso / Dental Patient (uncredited)

Jack Berle as Minor Role (uncredited)

Frank Biro as Fred - Director (uncredited)

Nick Borgani as Premiere Guest (uncredited)

William Boyce as Minor Role (uncredited)

Paul Bradley as Funeral Guest (uncredited)

Peter Brocco as Minister (uncredited)

Linda Burton as Minor Role (uncredited)

Patrick Campbell as Funeral Director (uncredited)

Calvin Coolidge as Self (archive footage) (uncredited)

Suzanne Covington as Minor Role (uncredited)

Billy Curtis as Lifeguard in Film (uncredited)

Luis Delgado as Minor Role (uncredited)

Peter Eastman as Screening Room Executive (uncredited)

Joyce Easton as French Maid (uncredited)

Geoff Edwards as Late Night Movie Host (uncredited)

Lynn Fields as Mailbox Gag (uncredited)

Harry Fleer as Cop (uncredited)

Paul Frees as Newsreel Narrator / Commerical Announcer / Man in Restaurant (voice)

Leonard Frey as Talk Show Guest (uncredited)

Sig Frohlich as Minor Role (uncredited)

Ben Frommer as Mexican Barfly (uncredited)

Dee Gardner as Minor Role (uncredited)

Eddie Garrett as Restaurant Patron (uncredited)

Bobby Gilbert as Minor Role (uncredited)

The Great John L. as Burly Man (uncredited)

Clive Halliday as Butler (uncredited)

Alvin Hammer as Cameraman (uncredited)

Carter Harbaugh as Tommy (uncredited)

Andre Hemmers as Minor Role (uncredited)

Brick Huston as Still Photographer (uncredited)

Scott James as Billy Jr. (uncredited)

Stardedt Kaava as Minor Role (uncredited)

Lou Kane as Storekeeper (uncredited)

Suzie Kaye as Amanda Lou Phipps (uncredited)

Kenner G. Kemp as Theatre Doorman (uncredited)

Walter Kightly as Minor Role (uncredited)

Joseph La Cava as Restaurant Patron (uncredited)

Ethelreda Leopold as Restaurant Patron (uncredited)

Marilyn Malloy as Nurse (uncredited)

Alan Marston as Restaurant Patron (uncredited)

Frank Mathias as Hearse Driver (uncredited)

Kres Mersky as Bathing Beauty (uncredited)

Celeste Michaels as Girl in Miniskirt (uncredited)

Howard Morris as Pedestrian Gag Man in 'Love Honor and Oh Boy' (uncredited)

Ottola Nesmith as Housekeeper (uncredited)

William H. O'Brien as Funeral Guest (uncredited)

Angel Pine as Minor Role (uncredited)

Murray Pollack as Wedding Guest (uncredited)

Ward Ramsey as Officer (uncredited)

Bob Rhodes as Cameraman (uncredited)

Christopher Ross as Musician (uncredited)

Mark Russell as Minor Role (uncredited)

Paul Russell as Funeral Guest (uncredited)

Cosmo Sardo as Pallbearer at Funeral (uncredited)

Joe Sawyers as Driver (uncredited)

Jeffrey Sayre as Pallbearer at Funeral (uncredited)

Johnny Silver as Little Man (uncredited)

Ralph Smiley as Hot Dog Man (uncredited)

Irene Tedrow as Billy's Mother in 'Forget Me Not' (uncredited)

Viki Vigen as Little Girl (uncredited)

Johnny Weissmüller as Jungle Jim (archive footage) (uncredited)

Jean Willes as Denise in Film Clip (archive footage) (uncredited)

Dick Winslow as Organist (uncredited)

Bill Zuckert as Prison Warden in Film (uncredited)