Riggs was born in Atlanta, Georgia, the son of Gina Ann (Carlton) and William Riggs. He has a younger brother, Grayson.
Riggs played a Munchkin in his musical theater debut, Atlanta's Fox Theater production of The Wizard of Oz, and got his first major acting break in the 2009 film Get Low (as the character Tom).
The Walking Dead
At age 10, Riggs was cast in his biggest role to date: Carl Grimes on the The Walking Dead, an AMC television horrordrama series. Grimes, his family and friends fight to survive in a violent apocalyptic world populated with zombies and the few surviving humans, some of whom are even more diabolical and dangerous than the zombies. The drama is the highest rated in cable television history and has smashed all previous ratings records. In 2012 and 2013, Riggs was nominated for the Young Artist Award for Best Leading Young Actor for his role on the show.