Biographies: Dermot Mulroney - Actor

Biographies

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Dermot Mulroney is an American actor born on October 31, 1963 in Alexandria, Virginia. He made his acting debut in the TV movie Sin of Innocence (1986). He's best known for the films Young Guns (1988), My Best Friend's Wedding (1997), The Wedding Date (2005), and August: Osage County (2013).