Adam Keefe Horovitz (born October 31, 1966), better known as
Ad-Rock or
King Ad-Rock, is an American
musician,
guitarist,
rapper,
producer, and
actor. He is best known as a member of the
hip hop group the
Beastie Boys. He is married to musician and feminist activist and playwright
Kathleen Hanna. He has denied internet listings that he was born in
South Orange, New Jersey. His sister is film producer
Rachael Horovitz. His father is Jewish, and his mother, who was of Irish descent, was Roman Catholic.