When Kristen Bell joined 'Parks and Recreation' season 6 as Leslie Knope's Eagleton counterpart, we didn't think much about the role itself. Then, mustachioed icon Sam Elliott joined as Ron Swanson's doppelganger, and the pattern emerged. So, who's the latest to join the bizarro Parks Department? Why, comedian Billy Eichner as Donna's mirror image ... sort of!

The news comes from TVLine, who adds from series creator Mike Schur that “He’s one of the funniest human beings I have ever seen in my entire life, and he’s Donna’s Eagleton doppelganger.” Understandably, not all of the doppelgangers necessarily need look like one another.

The bizarro 'Parks' will appear in an upcoming episode wherein Pawnee and Eagleton take on a joint venture, exposing the mirror images between the groups. Schur also previewed that casting continues on April (Aubrey Plaza)'s doppelganger, while “Tom’s doppelganger is a spoiler. It’s not who the actor is – it’s the concept behind it.”

While Rashida Jones and Rob Lowe will depart this year, Eichner joins fellow ‘Parks and Recreation’ season 6 returning guest star Lucy Lawless, and new guests supermodel Heidi Klum and Henry Winkler as Jean-Ralphio (Ben Schwartz)’s father. The hour-long September 26 premiere will venture to London largely to accommodate star Chris Pratt’s shooting role in Marvel’s ‘Guardians of the Galaxy,’ while the latest episodes will continue the many threads started by last season’s finale, Tom’s mysterious “Rent-a-Swag” competitor, and April’s move to veterinary school.

Well, what say you? Who do you think will round out the evil 'Parks and Recreation' team in season 6?

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