Rashida Jones and Rob Lowe Rashida Jones and Rob Lowe

Rob Lowe and Rashida Jones are leaving Parks and Recreation, TVGuide.com has confirmed.

"The news about Rob and Rashida is true -- they will be leaving the show after the 13th episode of the upcoming season six," executive producer Mike Schur said in a statement. "We've been working on their storyline (on and off) for four seasons now, and heading into this year, with the two of them contemplating parenthood, it felt like a natural time to move them into the next phase."

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Chris (Lowe) and Ann (Jones) decided in the Season 5 finale that they were going to keep trying to have a baby. "[Ann] still very much wants to get pregnant," Schur recently told TVGuide.com, "so that's going to be a big story for her, about whether or not that can happen, when and how soon, etc."

Jones, who has been a fixture on the series since its debut, most recently co-starred with Andy Samberg in the film Celeste and Jesse Forever (which she also co-wrote) while Lowe stars in the upcoming NatGeo telepic Killing Kennedy as JFK.

Parks and Rec returns on Thursday, Sept. 26 at 8/7c on NBC.