Dermot Mulroney was born in Alexandria, Virginia, the son of Ellen, a housewife and amateur actress originally from Manchester, Iowa, and Michael Mulroney, a law professor at Villanova University School of Law, originally from Elkader, Iowa.He has a sister, Moira, and three brothers, Conor, Kieran (who is also an actor) and Sean. Mulroney’s ancestors immigrated from Donegal and Mayo in Ireland during the Irish Potato Famine; he is of mostly Irish descent, although one of his grandmothers was German American.
