After four seasons as a recurring guest star, Jorja Fox is returning to CSI this fall as a full-fledged series regular, sources confirm to TVLine exclusively.

The actress - who was a CSI regular for the show’s first seven seasons - left the procedural at the start of Season 8 after appearing in only a handful of episodes. She returned for Season 9, but opted to remain a guest star - until now.

The news comes as CSI is undergoing a major cast shakeup as it enters its 12th season. As previously reported, Ted Danson has replaced Laurence Fishburne as the new supervisor.

CSI launches its new season on Sept. 21, in a new time slot - Wednesdays at 10/9c.