Shay Duffin (26 February 1931 – 23 April 2010) was an Irish-born American character actor of the stage and screen. Was in the 1993 film Leprechaun with Jennifer Aniston. He also had a role in the 1997 film Titanic.He was best known for writing and acting the title role in the one-man play Brendan Behan: Confessions of An Irish Rebel.
Irish playwright and character actor, often appearing in his own one-man plays. On screen often glimpsed as publicans/bartenders, priests or police officers.
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Appeared in four films that were nominated for the Academy Award for Best Picture. Two of them, Titanic (1997) and The Departed (2006), eventually won.