Following Sheen's decision to appear on the show, a tabloid report surfaced on Monday claiming that the former Two and a Half Men star has known about his diagnosis for the past four years. According to the tabloid, Sheen "made the heartbreaking confession" to multiple individuals, and has already begun a regimen of medication meant to counteract the effects of the disease.
Peoplealso reports that Sheen is HIV positive, according to their sources. "It's been going on for quite a while," Hollywood publicist Howard Bragman tells the magazine. "It was very hard to get up the courage for him to talk about it."
ET has reached out to Sheen for comment. The actor has not confirmed the rumors, and the claims have not been substantiated.
Sheen, a father of five, has made headlines in the past for his reported substance abuse problems. In October, he was headlocked by security and kicked out of Hennessey's Tavern in Dana Point, California, in exclusive video obtained by ET.