The other two Beastie Boys admitted that he was the author of about 80% of
the music on the album "Hello Nasty".
Few people know that he suffered from a major epileptic fit, caused
from flash photography. His seizures are now under control and is under
constant medical supervision.
He and ex father-in-law Donovan were inducted into the Rock and Roll Hall of Fame on the same night.
His mother died of causes related to alcoholism while he was in his teens.
He is of Ashkenazi Jewish (father) and Irish (mother) descent.
Pursued an acting career in the late 1980s and early 1990s, typically getting James Dean-style parts as brooding, troubled young men. He apparently abandoned his acting career in 1994, although he returned to the screen in Noah Baumbach's While We're Young (2014).