Career
He started his career at the age of ten months, with an uncredited appearance in Five Easy Pieces, a movie which starred his father, Billy Greenbush. He played a baby in the arms of Jack Nicholson. He also had roles in Critters, Elvis and Maine, Doogie Howser, Doctor of Medicine, and 2000 Malibu Road.
Greenbush began a full-time acting career in 1994.
