Arthur Hiller Director Rod Steiger W.C. Fields Actor Valerie Perrine Carlotta Monti Actor John Marley Studio Head Bannerman Actor Jack Cassidy John Barrymore Actor Bernadette Peters Melody Actor Dana Elcar Agent Dockstedter Actor Paul Stewart Florenz Ziegfeld Actor Billy Barty Ludwig Actor Allan Arbus Gregory LaCava Actor Milt Kamen Dave Chasen Actor Louis Zorich Gene Fowler Actor Andrew Parks Claude Fields Actor Hank Rolike Leon (uncredited) Actor Kenneth Tobey Parker (uncredited) Actor Paul Mantee Edward (uncredited) Actor Elizabeth Thompson Woman Patient (uncredited) Actor Eddie Firestone Private Detective (uncredited) Actor Linda Purl Ingenue Actor Clay Tanner Assistant Director (uncredited) Actor George Loros Schmidt (uncredited) Actor Bob Merrill Screenwriter Jay Weston Producer David M. Walsh Cinematographer John C. Howard Film Editing Henry Mancini Original Music Robert F. Boyle Production Design Arthur Jeph Parker Set Decoration Edith Head Costume Design Bill Jobe Costume Design