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

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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?

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:

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WEST HOLLYWOOD, CA - APRIL 09: Actor Kelsey Grammer attends the premiere of Magnolia Pictures' 'To The Wonder' at Pacific Design Center on April 9, 2013 in West Hollywood, California. (Photo by Jason Merritt/Getty Images)
NEW YORK - JUNE 13: Kelsey Grammer and Camille Grammer attends the 64th Annual Tony Awards at Radio City Music Hall on June 13, 2010 in New York City. (Photo by Kevin Mazur/WireImage)
NEW YORK - APRIL 18: Camille Donatacci Grammer and husband/actor Kelsey Grammer attends the after party for the opening of 'La Cage Aux Folles' on Broadway at Providence on April 18, 2010 in New York City. (Photo by Charles Eshelman/Getty Images)
WATCH WHAT HAPPENS LIVE -- Pictured (l-r): Camille Grammer and Adrienne Maloof -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
WATCH WHAT HAPPENS LIVE -- Pictured (l-r): Camille Grammer and Adrienne Maloof -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
WATCH WHAT HAPPENS LIVE -- Pictured (l-r): Camille Grammer, Adrienne Maloof and Taylor Armstrong -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
WATCH WHAT HAPPENS LIVE -- Pictured (l-r): Camille Grammer, Adrienne Maloof and Taylor Armstrong -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
WATCH WHAT HAPPENS LIVE -- Pictured (l-r): Camille Grammer, Adrienne Maloof and Taylor Armstrong -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
WATCH WHAT HAPPENS LIVE -- Pictured (l-r): Camille Grammer, Adrienne Maloof and Taylor Armstrong -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
NEW YORK, NY - JUNE 25: Actor Kelsey Grammer attends the 'Transformers: Age Of Extinction' New York Premiere at the Ziegfeld Theater on June 25, 2014 in New York City. (Photo by Jim Spellman/WireImage)
WATCH WHAT HAPPENS LIVE -- Pictured: Camille Grammer -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
NEW YORK, NY - JUNE 25: (L-R) Lorenzo Di Bonaventura, Jack Reynor, Kelsey Grammer, Bingbing Li, Michael Bay, Mark Wahlberg, Nicola Peltz, Stanley Tucci, Titus Welliver, and Steven Spielberg attend the New York Premiere of 'Transformers: Age Of Extinction' at the Ziegfeld Theatre on June 25, 2014 in New York City. (Photo by Larry Busacca/Getty Images for Paramount)
NEW YORK, NY - JUNE 25: Kelsey Grammer attends the New York Premiere of 'Transformers: Age Of Extinction' at the Ziegfeld Theatre on June 25, 2014 in New York City. (Photo by Larry Busacca/Getty Images for Paramount)
HONG KONG - JUNE 20: (CHINA OUT) (L - R) Stanley Tucci, Li Bingbing, Kelsey Grammer, Mark Wahlberg, Director Michael Bay, Nicola Peltz, Lorenzo di Bonaventura and Jack Reynor pose at the photo call for the worldwide premiere screening of 'Transformers: Age of Extinction' at Ritz-Carlton Hotel on June 20, 2014 in Hong Kong, Hong Kong. (Photo by ChinaFotoPress/ChinaFotoPress via Getty Images)
HONG KONG - JUNE 20: Kelsey Grammer attends the press conference for the worldwide premiere screening of 'Transformers: Age of Extinction' on June 20, 2014 in Hong Kong, Hong Kong. (Photo by Callaghan Walsh/Getty Images for Paramount)
HONG KONG - JUNE 19: Kelsey Grammer poses with fans at the worldwide premiere screening of 'Transformers: Age of Extinction'at the on June 19, 2014 in Hong Kong, Hong Kong. (Photo by Callaghan Walsh/Getty Images for Paramount)
WATCH WHAT HAPPENS LIVE -- Pictured: Camille Grammer -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
WATCH WHAT HAPPENS LIVE -- Pictured: Camille Grammer -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
CANNES, FRANCE - MAY 18: US actor Kelsey Grammer (L) and US actor Harrison Ford hold signs reading 'Bring Back Our Girls' as they arrive for the screening of the film 'The Homesman' at the 67th Cannes Film Festival in Cannes, France, on May 18, 2014. (Photo by Mustafa Yalcin/Anadolu Agency/Getty Images)
CANNES, FRANCE - MAY 18: (L-R) Ronda Rousey, Wesley Snipes, Sylvester Stallone and Kelsey Grammer attend'The Expendables 3' premiere during the 67th Annual Cannes Film Festival on May 18, 2014 in Cannes, France. (Photo by Foc Kan/FilmMagic)
CANNES, FRANCE - MAY 18: (Top L-R) Actors Dolph Lundgren, Mel Gibson, director Patrick Hughes, Sylvester Stallone, Harrison Ford, Wesley Snipes, Kellan Lutz, Ronda Rousey, (Front L-R) actors Kelsey Grammer, Glen Powell, Jason Statham, Antonio Banderas, Victor Ortiz and Randy Couture attend 'The Expendables 3' premiere during the 67th Annual Cannes Film Festival on May 18, 2014 in Cannes, France. (Photo by Traverso/L'Oreal/Getty Images)
CANNES, FRANCE - MAY 18: Arnold Schwarzenegger and Kelsey Grammer attends 'Expendables 3' Photocall at the 67th Annual Cannes Film Festival on May 18, 2014 in Cannes, France. (Photo by Danny Martindale/WireImage)
NEW YORK, NY - APRIL 02: Spencer Karen Grammer , Kelsey Grammer's oldest daughter joins Blair Underwood who's reprising the ttle role in the Nbc-Tv pilot 'Ironside' on April 2, 2013 in New York City. (Photo by Aby Baker/Getty Images)
NEW YORK, NY - APRIL 01: Actress Spencer Karen Grammer, Kelsey Grammer's oldest daughter, filming opposite Blair Underwood in CBS-TV's remake of 'Ironside' on April 1, 2013 in New York City. (Photo by Aby Baker/Getty Images)
LOS ANGELES, CA - FEBRUARY 09: Actor Kelsey Grammer arrives at the 55th Annual GRAMMY Awards Pre-GRAMMY Gala and Salute to Industry Icons honoring L.A. Reid held at The Beverly Hilton on February 9, 2013 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
TODAY -- Pictured: (l-r) Kathie Lee Gifford, Kelsey Grammer and Hoda Kotb appear on NBC News' 'Today' show -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
THE TONIGHT SHOW WITH JAY LENO -- Episode 4298 -- Pictured: (l-r) Actor Kelsey Grammer during an interview with host Jay Leno on August 14, 2012 -- (Photo by: Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)
FRASIER -- 'Sweet Dream' Episode 24 -- Pictured: (l-r) Peri Gilpin as Roz Doyle, Kelsey Grammer as Dr. Frasier Crane, Tom McGowan as Kenny Daly -- Photo by: Gale M. Adler/NBC/NBCU Photo Bank
NEW YORK - JUNE 13: Actor Kelsey Grammer (R) and wife model Camille Donatacci attend the 64th Annual Tony Awards at Radio City Music Hall on June 13, 2010 in New York City. (Photo by Mike Coppola/FilmMagic)
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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.

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