I Knew It Was You: Rediscovering John Cazale
- annos singulos: 2009
- Patriam: United States of America
- genus: Documentary
- Studio: Oscilloscope, RAT Entertainment, HBO Documentary Films
- keyword: friendship, 1970s, biography, tribute, cancer, filmmaking, retrospective, short film
- Director: Richard Shepard
- cast: John Cazale, Al Pacino, Meryl Streep, Robert De Niro, Olympia Dukakis, Gene Hackman