I Knew It Was You: Rediscovering John Cazale
- taona: 2009
- Firenena: United States of America
- Genre: Documentary
- Studio: Oscilloscope, RAT Entertainment, HBO Documentary Films
- Keyword: friendship, 1970s, biography, tribute, cancer, filmmaking, retrospective, short film
- tale: Richard Shepard
- Cast: John Cazale, Al Pacino, Meryl Streep, Robert De Niro, Olympia Dukakis, Gene Hackman