PBS shoots down Diddy's Twitter claims he'll appear on 'Downton Abbey'

No, it's not April Fool's Day. So it's unclear why Diddy's Twitter feed has suddenly been decked out with a "Downton Abbey" background and profile picture.

The 43-year-old rapper, producer and occasional actor surprised social media users Wednesday evening with the announcement that he had become "a series regular" on his "favorite show," the ITV/PBS costume drama "Downton Abbey."

MY BIG NEWS: So happy to announce that Im a series regular on DOWNTON ABBEY-my favorite show+i'll be debuting a sneak peek tonight 12am PST!

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— Diddy (@iamdiddy) May 15, 2013

I have to admit that Downton Abbey is one of my favorite shows- and thats why Im so excited today @downtonabbey

— Diddy (@iamdiddy) May 15, 2013

Sneak peek from the set of Downton Abbey. Stay tuned for a special preview tonight 12am PST #downtonabbey instagram.com/p/ZWTT75plzr/

— Diddy (@iamdiddy) May 15, 2013

PBS reps have denied the claims coming from Diddy's social media pages.

"It’s simply not true," PBS told Entertainment Weekly.

Does that mean Diddy's Twitter account has been hacked? Or does the hip-hop mogul have a "Downton Abbey" music video up his sleeve?

UPDATED: It's a Funny or Die video.