ICM’s Leigh Brillstein is stepping down as head of TV talent. Mike Jelline will take over the gig. I’m told she had groomed Jelline for the job for years. Leigh had done two tours as head of TV talent, and this was her decision to step down now and focus more on her clients than management. Meanwhile, she’s extending her deal at the agency. Of course, Leigh is the daughter of famed manager/producer Bernie Brillstein, who sadly has been unwell of late.