Gregg played the role of the BTK (Blind, Torture, Kill) Killer, Dennis Rader, in the 2005 made-for-television movie, "The Hunt For The BTK Killer."
Gregg has performed annually with the Rockworks Riff to benefit Hurricane Katrina victims since 2005.
Gregg appeared in the 1987 tv-movie "Bates Motel," a failed spin-off of the Psycho (1960) film series.
Gregg has appeared in 5 of director Brian DePalma's films, including:
Body Double (1984)
Raising Cain (1992)
Femme Fatale (2002)
The Black Dahlia (2006)
Gregg's songs have appeared on the soundtracks to the films Banter (1986) and Purgatory Flats (2002).
Gregg is married to the American Theater Director Lisa James.
Gregg specializes in playing villains and shady characters.
Gregg is 5 feet 11 inches tall.
Gregg has his own band and has played with fellow actor Bruce Greenwood, producing 3 albums together.
Gregg starred in the TV movie The Great Pretender (originally titled Dead End Brattington) in 2000 that was intended as a pilot for a series that was never picked up.
Gregg has appeared twice in the Star Trek franchise playing alien characters, as Gallatin in Star Trek: Insurrection (1998) and on the Enterprise episode "Dawn" as Zho'Kaan. He also lent his voice to the Star Trek: Hidden Evil computer game in 1999.
Gregg starred with Melanie Griffith and Craig Wasson in Body Double (1984) as the film's villain.
Gregg: I consider myself an actor that tries to have as many tools as possible in the bag. And I think that includes the method, then of course it includes some improv techniques, and includes all kinds of different things, because you never know when you're going to have to work on something and in what way. Sometimes you have to work on things very, very quickly, you don't have the time to, for instance, go from the inside-out. You know so much about a person that you can work that way, so you have to work from the outside in.
Gregg: Well, like many actors, I'm very grateful, I feel very fortunate, very lucky to be able to make a living with what I do and what I love. I'm surprised and grateful all the time. When I get my next job, because after you finish each job, you go, "Well, that's it. I'm never gonna work again." It's just a constant process for an actor, you always have to get up and start over after the one job is done.
Gregg Henry: Actors really are superstitious. You can always spot a group of actors at a restaurant. They're the ones spitting on their knuckles and hurling salt everywhere.