One Is a Lonely Number
- Jier: 1972
- Lân: United States of America
- Sjenre: Drama
- Studio: Metro-Goldwyn-Mayer
- Keyword: marriage, dating, divorce
- Direkteur: Mel Stuart
- Cast: Trish Van Devere, Monte Markham, Janet Leigh, Melvyn Douglas, Jane Elliott, Jonathan Goldsmith