Dermot Mulroney is an American actor and director, born on October 31, 1963, in Alexandria, Virginia. He is best known for his roles in films such as My Best Friend's Wedding, The Wedding Date, and August: Osage County. Mulroney has appeared in a variety of genres, showcasing his versatility as an actor. In addition to his film work, Mulroney has also made appearances on television, including notable roles in series like Friends and Shameless. He has received critical acclaim for his performances and continues to be an active figure in the entertainment industry.