Modern Family: Kelsey Grammer to guest Star as Cam's ... ex-boyfriend?!

The former Dr. Frasier Crane is paying a house call to Modern Family.

Kelsey Grammer is set to guest star in an upcoming episode of ABC's hit sitcom, according to Entertainment Weekly. The five-time Emmy winner will play Keith, a circus ringmaster (yes, really) — and an ex-boyfriend of Cam's (yes, really). Maybe they met back when Cam was playing his clown character Fizbo?

PHOTOSNathan Fillion on Modern Family: The Forecast Calls for Rainer Shine

The casting isn't a surprise, since Grammer has a longstanding connection with Modern Family creators Steven Levitan and Christopher Lloyd. The two were writers on Frasier, and they also co-created Grammer's Fox comedy Back to You.

See photos of Kelsey Grammer through the years:

Grammer recently played studio boss Pat Brady opposite Matt Bomer in Amazon's drama pilot The Last Tycoon, which got picked up to series. He also starred in two short-lived series: Starz's Boss and FX's Partners. Plus, he continues to voice murderous sidekick Sideshow Bob on The Simpsons, appearing in this season's "Treehouse of Horror XXVII."

Modern Family airs Wednesdays at 9/8c on ABC; Grammer's episode, filming this week, is slated to air in January.