- Country: USA
- Genres: Comedy, Documentary
- Release: 1991-05-28
- Director: Susan F. Walker
- Writers: David Ansen
- Language: English
- Stars: David Steinberg
- Runtime: min
- Awards: 1 nomination
- AKA: Det finns bara en Groucho Marx (Sweden) , The One, the Only... Groucho (United States of America) , The One, the Only... Groucho , Here He Is... The One, the Only... Groucho (United States of America)
- Plot: Groucho's life story, with jokes.
- IMDB:tt0142366
The One, the Only… Groucho Cast · · · ALL
Susan F. Walker
Director
Groucho Marx
Self (archive footage)
David Steinberg
Narrator
Dick Cavett
Self
Bill Cosby
Self
John Guedel
Self
Marvin Hamlisch
Self
Jack Lemmon
Self
Richard Lewis
Self
Art Linkletter
Self
Nat Perrin
Self
Gloria Stuart
(1910–2010)
Self