Piers Morgan mad at Kelsey Grammer for storming off his set

Piers Morgan is not taking a dis from Dr. Frasier Crane lightly.

The CNN host went on Twitter Thursday to express his displeasure after Kelsey Grammer stormed off his set before a scheduled interview.

The "Frasier" star wasn't happy that CNN showed a picture of his ex-wife Camille before the interview began.

"I like Kelsey Grammer personally, but this was a shockingly unprofessional thing to do. I wasn't even going to mention his ex-wife!" Morgan wrote on Twitter.