Claim: Ad-Rock's spouse is a feminist activist.

Adam Keefe Horovitz -LRB- born October 31 , 1966 -RRB- , 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 Kathleen Hanna .