As 'Lanterns' begins filming, it has been reported that 'Matlock' star Jason Ritter is set to join the DCU in a mysterious role.

March 14 (UPI) -- Matlock actor Jason Ritter is slated to join HBO's upcoming Lanterns series inspired by the Green Lantern DC comic. He will portray Billy Macon who tries to cash in on his family's name as he carries out tasks for his father, several outlets report.

The eagerly awaited HBO series Lanterns, which is based on DC Comics' Green Lantern universe, has cast Jason Ritter in a recurring role.

Nicole Ari Parker has joined the cast of Chris Mundy, Damon Lindelof, and Tom King's Aaron Pierre and Kyle Chandler-starring series Lanterns.

HBO officially picked up “Lanterns,” the first live-action series created expressly for DC Studios under co-chairmen/co-CEOs James Gunn and Peter Safran, in June. The series was given an eight-episode, straight-to-series order by HBO, with Chris Mundy (“True Detective: Night Country,” “Ozark”) serving as showrunner and exec producer.

Ritter is the latest in a growing cast list for DC's "Lanterns." Earlier this week it was announced Nicole Ari Parker ("And Just Like That") had joined the cast as Bernadette. Acc

HBO’s Lanterns is adding to its cast again, signing Jason Ritter for a recurring role. Ritter will play a character named Billy Macon in the series based on DC’s Green Lantern. Billy is described as “a good-looking charmer who does his father’s bidding.