UPDATED: I have learned that Michael Ellenberg, EVP drama development for HBO, is exiting the pay cable network. There is no official word on replacement but I hear that EVP comedy Casey Bloys would likely be elevated to oversee both comedy and drama. There could be other internal promotions, with SVP’ David Levine’s name mentioned as a possibility. HBO declined comment. (UPDATE: The pay cabler later confirmed our scoop that Ellenberg was leaving and Bloys would in fact, be overseeing both comedy and drama. Read the story here).

Ellenberg, who came from a feature background, joined HBO in 2011 as head of drama series and SVP of HBO Entertainment and was promoted to EVP in 2013. He has overseen such HBO dramas as Game of Thrones, True Detective and The Leftovers. HBO’s drama portfolio has shrunk over the past couple of years as several series, including True Blood, Boardwalk Empire and The Newsroom, came to an end. The network has high-profile new period drama Vinyl coming up as well as the return of Emmy-winning GOT and the final third installment of The Leftovers. Season 3 of True Detective is still in limbo, while new series Westworld is on a production hiatus, slated to resume filming in March. HBO just gave a series pickup to David Simon’s The Deuce.

Prior to joining HBO, Ellenberg spent four years at Scott Free Productions as SVP, working on the production of the Ridley Scott-directed Prometheus as well as films Robin Hood, Cyrus and Child 44. Before that, Ellenberg spent three years at Scott Rudin Productions in Los Angeles as VP.