Brother of Michele Conaway.
He has no children of his own. He has a step son with Rona.
His ex-wife, Rona Newton-John, is Olivia Newton-John's sister.
Is a grandfather (grandson born January 1997). (Admitted this on NBC's "Later with Greg Kinnear" (1994), July 6/98, with guest host Rita Sever).
Wanted to be an astronaut when he was little.
Youngest of three kids.
While filming Grease (1978), had to walk slightly stooped so John Travolta would appear taller.
In an episode of "Taxi" (1978), the song 'Summer Nights' from the movie Grease (1978) is playing on a jukebox, but instead of John Travolta singing the lead, it's Jeff Conaway. When _Grease (1978)_ was on Broadway, Jeff Conway played the role of Danny, so this soundtrack is the Original Broadway Cast recording, not the movie soundtrack.
Though he played Kenickie in the movie version of Grease (1978), he appeared in the Broadway production as Danny Zuko.
Appeared in an episode of "Murder, She Wrote" (1984) ("Birds of a Feather") as an Off-Broadway actor from New York who had been "mostly a cab driver" - a reference to his role in the TV series, "Taxi" (1978).
Saw an episode of Babylon 5 on TV and liked it so much he went down to the production studio to see the show being filmed. He was spotted and used for a bit part, which grew into a recurring character, and eventually a full-time role in the series.
Is an acting teacher and coach, with his students including James Evans (I) and Joey Sylvester (I).
