According to Deadline, executive producer Darren Star is at the center of a fallout. ABC Studios has barred Star from going to the set and his 'G.C.B.' office. In addition to being banned from the set, Star has been asked not to speak to writer and fellow executive producer Robert Harling and showrunners Aaron Harberts and Gretchen Berg.

However, Star continues to be involved with the series.

The 'Sex and the City' creator is still giving notes on scripts and cuts, but to the studio, not to the executive producers. Star is also in charge of marketing and publicity for the mid-season dramedy.

The arrangement is temporary, according to Deadline. Drama arose between former friends Star and Harling as early as the pilot, but Star was never supposed to be full-time on 'G.C.B.' He's still under a contract with HBO, his Goldie-Hawn-fronted comedy project is awaiting word on pilot production.

No word on how this may affect 'G.C.B.'