All Stories: Two and a Half Men

Charlie Sheen, the wayward star of U.S. television comedy "Two and A Half Men," said on Tuesday he was diagnosed as HIV positive some four years ago and had been extorted for more than $10 million to keep the information quiet.

Former "Two and a Half Men" star Charlie Sheen is to make a "revealing personal announcement" on the "Today" show on Tuesday, according to broadcaster NBC, following reports in online and tabloid media that the Hollywood actor has been diagnosed as HIV positive.