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In 1996 he became engaged to actress Amy Ryan. Won Broadway's 2004 Tony award as Best Actor (Featured Role - Play) for his performance as Ralph in "Frozen." This followed two Tony nominations for plays written by Martin McDonagh: in 1998 as Best Actor (Featured Role - Play) for "The Beauty Queen of Leenane;" and in 1999 as Best Actor (Play) for "The Lonesome West." His first name is actually pronounced in the traditional Irish way (Bree'un). In 1998 he was nominated for a Tony Award for best actor for his role in Martin Mc Donagh's The Beauty Queen of Leenane He is from County Cavan in Ireland. In 2004 he withdrew from a Kennedy Center production of "A Streetcar Named Desire" starring Patricia Clarkson and girlfriend Amy Ryan in the role of Mitch in order to follow his hit off-Broadway show "Frozen" to Broadway. He subsequently won a Tony. Trained at the Samuel Beckett Center and Trinity College in Dublin. He won the 2004-2005 Drama Desk Award for Outstanding Actor for his Role in John Patrick Shanley's Doubt He was nominated for Outstanding Actor at the Drama Desk Awards for his role in Frozen. Before he made his name on Broadway he used to perform in plays for a Theatre company he formed with writer Tony Kavanagh Despite being born in Ireland, O'Byrne has lived in New York for nearly 20 years and he is a devoted follower of the Mets