Safran, connected to the TV soap "Gossip Girl" since the 2007-08 season, would become showrunner and an executive producer of "Smash." He is currently showrunner of "Gossip Girl."
"Smash," the show about the making of a Broadway musical about Marilyn Monroe, is currently 12 episodes into a 15-episode first season that will conclude in May with the musical having an out-of-town tryout. Rebeck penned the April 23 episode, as well four earlier episodes.
It's not immediately clear how "Smash" may change under Safran. Fans and critics expecting a juicy showbiz drama have questioned some of the seemingly off-topic domestic storylines that have emerged in the first season, including the woes of the show's central playwright character played by Debra Messing (her affair, her baby adoption, her neglected science-teacher husband, her teen soon's arrest and drug use).
Ratings were high for the series debut, but have waned since then. The April 23 episode had six million viewers; the Feb. 6 pilot episode earned 11.5 million viewers.