American musician better known as Ad-Rock, the guitarist for the Beastie Boys.
He performed in a band called The Young and the Useless, which accompanied The Beastie Boys, thus paving the way for his shot with the band.
He has acted in multiple TV series and films, including roles in the features Lost Angels and While We're Young.
He married Kathleen Hanna in 2006.
He and Mike Diamond were bandmates in the Beastie Boys.