10/09/2012 04:49 pm ET

'Parks And Recreation': Megan Mullally Returning And More Casting News

Megan Mullally is returning to "Parks & Recreation." Mullally will guest star in the Season 5 episode titled "Ron and Diane," according to TV Guide.

The actress, who is married to "Parks & Rec" star Nick Offerman, will appear in the ninth episode of Season 5 and will stir up trouble for Ron Swanson (Offerman) and his new lady friend, Diane (Lucy Lawless). Lawless, known for her roles on "Xena" and "Spartacus," took to Twitter after Mullally's appearance was announced.

Mullally has appeared numerous times on "Parks & Recreation" as Tammy 2, Ron Swanson's ex-wife.

In other casting news ...

"Made in Jersey" has tapped Eric Stoltz for a guest role.
Stoltz will play the leader of a cult in upstate New York. [EW]

Angela Kinsey already has her first post-"Office" gig.
Kinsey will co-star opposite Rachael Harris in "Dirty Blondes," a comedy based on the duo's real-life friendship. The show is a put pilot at Fox. [TVLine]

Buzz Aldrin will guest star on "The Big Bang Theory."
Aldrin will cameo as himself on the CBS comedy. [THR]

Madchen Amick and Glenne Headly have joined "Witches Of East End."
The two co-star opposite Julia Ormond, Jenna Dewan-Tatum and Rachel Boston in the Lifetime pilot. [THR]

'Parks and Recreation'