Gregg Lee Henry (born May 6, 1952) is an American (United States) theater, film, and television character actor and rock, blues, and country musician. He is best known his critically acclaimed performance as serial killer Dennis Rader in the made-for-television movie The Hunt for the BTK Killer, and for playing various "heavies" in various films, such as in Payback (Payback (film)) (1999) and Brian De Palmas Body Double (1984).

Henry has been featured in over 75 television programs, including The Riches, Firefly (Firefly (TV series)), Gilmore Girls, 24 (24 (TV series)), Airwolf, CSI: Crime Scene Investigation, Murder, She Wrote, Matlock (Matlock (TV series)), L.A. Law, Falcon Crest, Moonlighting (Moonlighting (TV series)), Magnum P.I., Rich Man, Poor Man Book II and Glee (Glee (TV series)).

Henry is married to the American Theater Director Lisa James and lives in Los Angeles, California. He recently played Hugh Pannetta alongside Eddie Izzard and Minnie Driver on the FX television series The Riches.