Sacha Baron Cohen admitted on Friday that he will probably never play his two most famous characters again.

Cohen said he was sad to think that Borat and Ali G are dead.

"When I was being Ali G and Borat I was in character sometimes 14 hours a day and I came to love them, so admitting I am never going to play them again is quite a sad thing," he said. "It is like saying goodbye to a loved one. It is hard, and the problem with success, although it's fantastic, is that every new person who sees the Borat movie is one less person I 'get' with Borat again, so it's a kind of self-defeating form, really.

"It's upsetting, but the success has been great and better than anything I could have dreamed of."

Ali G is Cohen's wannabe-rapper character who humiliates those who he interviews.  Borat is the story of an anti-Semitic, homophobic reporter from Kazakhstan who comes to America to learn more about the culture.