Piers Morgan claims Kelsey Grammer walked off the set of Piers Morgan Tonight Wednesday, after the CNN host reportedly showed a clip of Grammer's ex-wife Camille in the show's open.

Kelsey Grammer was supposed to be on my show, but he ran out of the building. Strange,” Morgan tweeted Wednesday. He later added, “So, Kelsey Grammer saw a photo of his ex-wife Camille in the open of our show and legged it. Extraordinary. Never had this happen before … I like Kelsey Grammer personally, but this was a shockingly unprofessional thing to do. I wasn’t even going to mention his ex-wife.”

Stan Rosenfield, Grammer’s publicist, told The Hollywood Reporter, “Piers needs to take responsibility for what he did to Kelsey. It’s called accountability.” Meow!

Um, where's the video of this?!