'Rizzoli & Isles' showrunner Janet Tamaro stepping down after Season 4

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TNT's hit series "Rizzoli & Isles" is about to get a creative shake-up. Janet Tamaro will step down as showrunner at the end of Season 4, Variety reports.

Tamaro decided to not renew her contract for Season 5, but will remain on board the series as a consulting producer. Tamaro has helmed the series since it premiered on TNT in 2010, and a new showrunner to take her place has yet to announced.

Currently, Tamaro has two new TV projects in development. "I did four seasons that I'm incredibly proud of, and the show is in great shape," Tamaro says. "It's been phenomenal, but I'm at the top of my game creatively and really want to use the juice I have to produce other projects...I do so love writing female characters, and I want to do more!"

While Tamaro says that the recent suicide of cast member Lee Thompson Young "was not the reason" for her move, "it was a catalyst for me to examine what I want to be doing next."

"It's very, very hard to leave. Change is hard," Tamaro says. "I will miss the daily interaction with the cast and crew...It's time to let go of the safety bar, and do something challenging."

The final episodes of "Rizzoli & Isles" Season 4 are set to air on TNT early next year.

Photo/Video credit: TNT