- Wanted to be an astronaut as a child.
- Made his Broadway debut at age 10 in the play All the Way Home, which starred Lillian Gish and Colleen Dewhurst.
- As a teen, was in a rock band that once opened for Chuck Berry.
- Was a student of both Olympia Dukakis and Martha Graham while attending New York University.
- Played multiple roles in the musical Grease, including Danny Zuko (on Broadway in the early 1970s) and Kenickie (in the 1978 film version).
- Left Taxi after three seasons, but returned as a guest star during the show's fourth season.
- Appeared on season 3 of Celebrity Fit Club, but left the show after three episodes to enter rehab. He later appeared on the first two seasons of Celebrity Rehab with Dr. Drew.
- 1980, Golden Globe — Best Performance by an Actor in a Supporting Role in a Series, Miniseries or Motion Picture Made for Television: Nominee
- 1979, Golden Globe — Best Performance by an Actor in a Supporting Role in a Series, Miniseries or Motion Picture Made for Television: Nominee
- Kerri Conaway — Ex-wife
- Vikki Lizzi — Ex-fiancée
- Rona Newton John — Ex-wife
- Lisa Hartman — Ex-significant Other
- Michele — Sister
- Mary Ann Brooks — Mother
- Attended University of North Carolina School of the Arts, Winston-Salem, North Carolina, United States; attended New York University, New York, New York, United States
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