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06/27/2013 12:25 pm ET

Diddy On 'Downton Abbey'? Julian Fellowes Says 'Never Say Never'

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Turns out, Diddy might actually guest star on "Downton Abbey."

"Downton Abbey" creator Julian Fellowes has seen Diddy's Funny or Die video and said he thought it was fabulous. "I absolutely adored it, but I just couldn’t see how he could have done it," the creator told The Telegraph.

As for an actual part for Diddy on "Downton Abbey," Fellowes said, "Never say never ... though I imagine he'd steal the scene, even if it was a small part."

If Diddy joined the "Downton" cast, he wouldn't be the only American. Paul Giamatti will guest star as Harold Levinson, Cora's (Elizabeth McGovern) playboy brother in the "Downton Abbey" Season 4 finale. Shirley MacLaine will also return as Martha, Cora's mother.

Season 4 of "Downton Abbey" will be filled with new faces. Tom Cullen will play Lord Gillingham, a Crawley family friend; Nigel Harman will play Green, a new valet; Dame Harriet Walter will play Lady Shackleton, the Dowager Countess's friend; Joanna David will play the Duchess of Yeovil; "Smash's" Julian Ovenden will appear as aristocrat Charles Blake; and Dame Kiri Te Kanawa will debut as a guest who sings in the house.

Gary Carr will appear as Jack Ross, a jazz singer and "Downton Abbey's" first black character.

"Downton Abbey" Season 4 premieres on Sun., Jan. 5, 2014 on PBS.

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