Gilliam graduated from Woodrow Wilson High School , Dallas, in 1956 and was inducted into the school's hall of fame in 2004. He was the Grand Marshall of the 2018 Dallas Texas St Patricks Day Parade.
Gilliam has had roles in several other motion pictures such as Honeymoon in Vegas, Thunderbolt and Lightfoot, Farewell, My Lovely, Fletch, Gator, Telefon, and The Terror Within II. His television appearances include Alice, Charlie’s Angels, The A-Team,The Dukes Of Hazzard, The Fall Guy, and he appeared as a regular on Evening Shade.
