Hollywood bad boy Charlie Sheen revealed on Tuesday he is HIV positive.

In an interview Tuesday on NBC's "Today," the 50-year-old Sheen says he tested positive for the virus that causes AIDS about four years ago.

It's a hard three letters to absorb. It's a turning point in one's life," the former "Two and a Half Men" actor said.

Sheen said he had already paid "upwards of $10 million" to keep the information secret.

"We're talking shakedowns," he said.

Sheen said that he did have unprotected sex since being diagnosed, but also claimed he had told every partner since being diagnosed that he was HIV positive.