Brian Mannion Dennehy (born July 9, 1938) is an American actor of film stage and screen.
Dennehy was born in Bridgeport, Connecticut, the son of Hannah and Edward Dennehy, who was a wire service doctor for the Associated Press; he has two brothers, Michael and Edward. The family relocated to Long Island, New York, where Dennehy attended Chaminade High School in the town of Mineola.
Rather than immediately chase his dreams of stage and screen, Dennehy enlisted in the U.S. Marine Corps in 1959, actively serving until 1963. He went on to attend Columbia on a football scholarship to major in history, where he also became a member of the Sigma Chi fraternity, before moving on to Yale to study dramatic arts. He played rugby for Old Blue RFC. He currently resides in Woodstock, CT.