Credit: Frank Micelotta/Invsion/AP

Modern Family has just cast a double Emmy winner to complicate Mitchell’s life.

Kristen Johnston—the star of The Exes who won two Outstanding Supporting Actress trophies for her work on 3rd Rock from the Sun—will guest-star in an episode as a law colleague of Mitchell (Jesse Tyler Ferguson) who is going through a rough time, the network has confirmed. When he invites her to spend the night at his house, he discovers that she’s more of an emotional disaster than he thought.

The episode will air early in season 6, which kicks off Sept. 24.