PIERS MORGAN slams KELSEY GRAMMER mercilessly after ankling interview. Kelsey slams back!

Morgan called  Grammer "shockingly unprofessional" on Twitter after the enigmatic Boss star left CNN Studios in Los Angeles prior to a scheduled interview, rattled by a preview featuring a photo of his ex-wife Camille, RadarOnline.com reported.

Morgan wrote a series of tweets explaining the turn of events: "Kelsey Grammer was supposed to be on my show now but ran out of the building. Strange. #CNN.

"So, Kelsey Grammer saw a photo of his ex wife Camille in the open to our show and legged it. Extraordinary. Never had this happen before.

"I had a very friendly chat with Kelsey backstage, He said he was really looking forward to the interview. Weird. #CNN.

He wrapped up saying, "I like Kelsey Grammer personally, but this was a shockingly unprofessional thing to do. I wasn't even going to mention his ex-wife!"

Grammer's spokesman Stan Rosenfield told The Hollywood Reporter, "Piers needs to take responsibility for what he did to Kelsey.

"It's called accountability."