Dermot Mulroney Scroll down for movie list. Dermot Mulroney grew up in Alexandria, Va., and went to Maury Elementary School. He played the cello in school and city youth orchestras and acted in children's community theater. He made his high school stage debut in an awful play called "Are Teachers Human" at George Washington (I) High School. He graduated from T.C. Williams high school in 1981. His dad was a lawyer. He grew up with three brothers, Sean, Conor and Kieran (now also an actor) and a sister named Moira. He was unusually short for most of his years in high school and was known for having a sharp, if not very nice, sense of humor.
Trivia
Graduated from Northwestern University in 1985.
Is in a band called 'The Low & Sweet orchestra'
Was a member of Phi Gamma Delta fraternity at Northwestern University.
Sister Moira works in the Philadelphia DA's office as an assitant district attorney.
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