Adam Horovitz, known as Ad-Rock, was born on October 31, 1966, in the United States. A rapper, producer and actor, he is a member of the Beastie Boys.

The trio mixed hip hop, punk and samples and became one of the most influential groups in American music in the 1980s and 1990s.

The date marks the birthday of one of the names who helped break the border between rap and rock.