While we still don’t know exactly when Ron Swanson will be back to share his manly wisdom or when Leslie Knope will be hard at work again, we do know that a trio of famous faces are returning to Pawnee for the final season of Parks And Recreation.

First up will be Mad Men star Jon Hamm, who made a memorable surprise appearance during the season six finale flashforward sequence. He played inept National Parks employee Ed, who was actually worse than Jerry/Larry.

Hamm’s return was first reported by Entertainment Weekly. It’s not clear how many episodes he will appear in.

Meanwhile, TV Line reports that Rob Lowe and Rashida Jones will make one more appearance in one episode. Ann (Jones) and Chris (Lowe) moved to Michigan to start a family during season six, much to the disappointment of Leslie.

Back in August, the Parks team announced that Megan Mullally and Natalie Morales would also be making appearances during the final season.

NBC hasn’t scheduled Parks’ return, but it will be back early next year. The series stars Amy Poehler, Adam Scott, Aziz Ansari, Nick Offerman, Retta, Jim O’Heir, Aubrey Plaza, and Chris Pratt.

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