- Country: Italy
- Genres: Comedy
- Release: 1971-03-17
- Director: Franco Giraldi
- Writers: Tonino Guerra , Ruggero Maccari , Luisa Montagnana
- Language: Italian
- Stars: Monica Vitti , Ugo Tognazzi , Orazio Orlando , Véronique Vendell , Filippo De Gara , Nerina Montagnani , Roy Bosier , Paola Natale , Giuliano Isidori , Brizio Montinaro
- Runtime: 104 min
- Awards: 1 win
- AKA: El proxeneta y la testigo (Spain) , La supertestimone (Italy) , La supertestimone , A Super Testemunha (Brazil) , O super gois tou ypokosmou (Greece) , Super témoin (France, French Republic) , A Principal Testemunha (Portugal, Portuguese Republic) , Nászéjszaka a börtönben (Hungary) , Pos na katorthosete na fate... 20 hronia fylaki (Greece) , Świadek koronny (Poland)
- Plot: Comedy about a man (Tognazzi) who is sentenced to life imprisonment mainly because of a woman's (Vitti) testimony, but she later marries him during his sentence.
- IMDB:tt0067808
La supertestimone Cast · · · ALL
Franco Giraldi
Director
Monica Vitti
Isolina Pantò
Ugo Tognazzi
Marino Bottecchia detto 'Mocassino'
Orazio Orlando
Charlot, il secondino capo
Véronique Vendell
L'amica fotografa
Filippo De Gara
Ispettore
Nerina Montagnani
Madre di un detenuto
Roy Bosier
Un detenuto