Kirstie Alley doesn't like Conan O'Brien very much, and she's taking to her Twitter account to tell the world.

In a back and forth with Star Jones, the former 'Cheers' star tweeted: "WHAT!!!! SOMEONE OUT THERE "ACTUALLY" MAKES FUN OF FAT CELEBRITIES? NOOOOOOO!!!!! I'M SHOCKED!!!! lol."

She added: "I'll tell you ONE B---- I'm gonna knck out next time I see her is CONAN O'B---- O'BRIAN..that guy acts like I bit his d--- off."