Modern Family

The impressive list of Modern Family guest stars just added another name.

To Ed Norton, Elizabeth Banks and Minnie Driver, we can now add Justin Kirk.

Best known for his hilarious turn on Weeds as Nancy Botwin's brother-in-law, Andy, Kirk will play the owner of a clothing line on the ABC sitcom. He'll interact with Mitchell, who quits his law firm and comes aboard Kirk's company as its legal council.

The character will be named Lee Keizler and Kirk is currently booked for one episode in the spring.