- Jeanne Crain
- Anne Gilbreth
- Myrna Loy
- Dr. Lillian M. Gilbreth
- Debra Paget
- Martha Gilbreth
- Jeffrey Hunter
- Dr. Bob Grayson
- Edward Arnold
- Sam Harper
- Hoagy Carmichael
- Thomas George Bracken
- Barbara Bates
- Ernestine Gilbreth
- Robert Arthur
- Frank Gilbreth, Jr.
- Verna Felton
- Cousin Leora
- Robert Adler
- Harper's Chauffeur
- Merry Anders
- Student / Graduate (uncredited)
- Charlotte Austin
- Student
- David Bair
- Bit Role
- Benny Bartlett
- 'Bubber' Beasley
- Willis Bouchey
- Kendall Williams
- Boyd Cabeen
- Minor Role
- Teddy Driver
- Jack Gilbreth
- Robert Easton
- Franklin Dykes
- William Forrest
- Col. Putnam
- Everett Glass
- Faculty Member
- A. Cameron Grant
- Judge
- June Hedin
- Jane - Age 22
- Mary Alan Hokanson
- Nurse
- Jimmy Hunt
- Fred Gilbreth
- Tommy Ivo
- William Gilbreth
- Jacqueline Kenley
- Girl
- Lori Lanegger
- Susan Whitaker
- Jack Larson
- Packy Talbot
- Roddy McCaskill
- Bob Gilbreth
- Martin Milner
- Al Lynch
- Carol Nugent
- Lillie Gilbreth
- Maudie Prickett
- Lady with Fan
- Clay Randolph
- Morton Dykes
- Dick Rich
- Bit Role
- Michael Ross
- Club Doorman
- Syd Saylor
- Cab Driver
- Mario Siletti
- Albert - the Barber
- Anthony Sydes
- Dan Gilbreth
- Al Thompson
- Porter
- Tina Thompson
- Jane Gilbreth as a Child
- Clifton Webb
- Frank Bunker Gilbreth
- Cecil Weston
- Emily
