By Dan Snierson
Updated January 18, 2013 at 04:31 PM EST
Michael Buckner/Getty Images

We’ve already met Ben’s parents (Jonathan Banks and Glenne Headly), so now it’s time to meet his sister. Annabeth Gish (The X-Files, Mystic Pizza) has been cast as Adam Scott’s onscreen sibling on Parks and Recreation, EW has learned.

In an episode of the NBC comedy set to film next week and air later this season, Ben and fiancée Leslie (Amy Poehler) take a road trip to his hometown of Partridge, Minn., where they meet up with his sister, Stephanie (Gish). Homecoming week should be interesting, as Ben briefly served as the town’s mayor at age 18 before being impeached.

Gish, who co-stars in the FX drama pilot The Bridge, has recently appeared on such shows as Once Upon A Time, Pretty Little Liars, and CSI.

Other famous guests in Parks‘ fifth season include Joe Biden, Christie Brinkley, Jason Schwartzman, Jenny Slate, and Newt Gingrich.

Read more:

‘Parks and Recreation’: Jenny Slate to play Jean-Ralphio’s twin sister — EXCLUSIVE

Jason Schwartzman to guest on ‘Parks and Recreation’

Newt Gingrich films cameo for ‘Parks and Recreation’

‘Parks and Rec’: ‘Breaking Bad’ actor Jonathan Banks to play Ben’s dad