CBS entertainment chief Nina Tassler says the network is worried about the Two and a Half Men star's personal life, though the network is so far happy with his professional performance.
"We have a high level of concern. How could we not?" Tassler said at the Television Critics Association press tour in Pasadena on Friday. "This man is a father. He's got children. He has a family. So obviously there's concern on a personal level."
Sheen, 45, has been in the headlines frequently over the past year due to a messy split from his wife Brooke Mueller and after allegedly trashing a hotel suite while in the company of a adult film star in New York.
Despite his hard partying, Tassler insists Sheen, who is the highest paid actor on primetime comedy TV, still does his job well.
"Charlie is professional," she adds. "He comes to work. He does his job extremely well. It's very complicated … The show is a hit, and that's all I have to say."
Tassler also says that Sheen "knows the level of concern we have," but that the network has no plans to change anything about the show.