Retired U.S. cyclist Lance Armstrong has admitted in an exclusive interview with Oprah Winfrey that he used performance-enhancing drugs, media reports said.

The cyclist came clean about his doping in an interview with the popular television personality that will air on Thursday, a person familiar with the contents of the interview told USA Today on condition of anonymity.

Armstrong, who was stripped of his seven Tour de France titles last year, came to the interview "ready" to talk, Winfrey said in a Twitter posting.

Winfrey will air the interview Thursday on her OWN cable network at 9:00 p.m. and it may be released on her Oprah.com Web site later.

For years, Armstrong categorically denied the doping allegations leveled against him, but he announced in August that he would no longer fight them.

A cancer survivor who is regarded as one of the all-time greatest road cyclists, Armstrong issued a statement on his Web site after choosing not to appear before a U.S. Anti Doping Agency, or USADA arbitration panel to respond to the doping charges.

"There comes a point in every man's life when he has to say, 'enough is enough.' For me, that time is now. I have been dealing with claims that I cheated and had an unfair advantage in winning my seven Tours since 1999," the Aug. 23 statement read.

"The only physical evidence here is the hundreds of controls I have passed with flying colors," Armstrong said.

Armstrong has lost lucrative endorsement contracts as a result of the scandal and in October he stepped down from the board of directors of the cancer-fighting Livestrong Foundation he founded in 1997. EFE