John Cazale

Wikipedia - "John Holland Cazale (/kəˈzeɪl/; Italian pronunciation: [kaˈdzaːle]; August 12, 1935 – March 12, 1978) was an American actor. During his six-year film career, he appeared in five films, each of which was nominated for the Academy Award for Best Picture: The Godfather, The Conversation, The Godfather Part II, Dog Day Afternoon and The Deer Hunter. He also appeared in archival footage in The Godfather III, which also was nominated for the Best Picture Oscar. He is the only actor to have this multi-film distinction. From his start as an acclaimed theater actor, he became one of Hollywood's premier character actors, starting with his role as Fredo Corleone in Francis Ford Coppola's film The Godfather. 'Cazale broke hearts on screen with portrayals of volatile, vulnerable, vacillating men, including Pacino's tragic bank-robbing partner in Dog Day Afternoon,' wrote David Germain of the Associated Press. Cazale is described as an actor 'whose intense face is known to just about any serious cinema fan but whose name often escapes them'."
Wikipedia
5 Things You Didn't Know About John Cazale (Video)
YouTube: PT.1 - "I KNEW IT WAS YOU":JOHN CAZALE (2009), PT.2, PT.3