- As a youngster, nearly died of scarlet fever, which kept him bedridden for a year; walked with a limp after recovery.
- After college and a stint in the Marines, worked as a newspaper reporter in Kenosha, WI, and was almost fired for turning a biography about a prominent local businessman into an obituary.
- Took a friend's advice to study acting in New York City in order to sharpen his ear for dialogue, which he had difficulty writing; his teacher was Oscar nominee William Hickey (1985's Prizzi's Honor), and he's been acting ever since.
- Did enough of his own stunts for Backdraft (1991) to earn a credit as part of the stunt crew.
- Since the late 1970s, has called Ketchum, ID, home.
- Theodore Glenn — Father
- Rio Glenn — Daughter
- Elizabeth Glenn — Mother
- Dakota Glenn — Daughter
- Bonnie — Sister
- Terry Glenn — Brother
- Carol Schwartz — Wife
- College of William and Mary, Williamsburg, VA (BA in English, 1963)
- Birth Name: Theodore Scott Glenn
- Birth Place: Pittsburgh, PA
- Birthday: January 26, 1941, Aquarius
- Profession: Actor