Parks and Recreation is about to get even funnier.

Former Will & Grace star Megan Mullally will guest star on an upcoming episode, actress Rashida Jones confirmed this week to TV Guide.

The hilarious actress will portray the ex-wife of Ron Swanson, Leslie Knope's serious, dry-witted boss. 

"She's married to Nick Offerman, who plays Ron Swanson, but they play exes on the show," Jones said of Mullally's guest-starring stint, which will air on October 29.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.