One of the stars of the highest-rated sitcom on TV may be leaving the show. People's TV Watch is reporting that Charlie Sheen is parting ways with the hit Monday night series Two and a Half Men. Here's what the site's inside source said.

"Charlie's just done," says a set source. "And he's quietly telling his friends he's not coming back."

Sheen's contract for the show is up after this season and it was said that the actor turned down the network's latest offer.

"He wants to move on," says a friend of the actor, whose contract is fulfilled after he tapes this season's 22nd episode. "Leaving is 100 percent his idea."

A network representative, who wouldn't comment on the matter but another source close to the show said, "negotiations are ongoing and nothing has been determined."