South African-born actress Charlize Theron auctioned off a kiss for $140,000, and the winning bidder was a woman, US magazine reported on Friday.

Theron, 34, took part in a live auction during a gala for the charity OneXOne Thursday in San Francisco. She was initially selling a 2010 trip to South Africa that included World Cup tickets, a safari and a meet-and-greet with Nelson Mandela.

But she raised the stakes after bidding stalled at $37,000, far less than actor Jeremy Piven had just raised.

To sweeten the deal, she offered up a seven-second kiss for $130,000 to a male bidder, but a woman in the audience quickly bettered the deal with a $140,000 bid.

Theron is in a long-term relationship with actor Stuart Townsend, 36. "My boyfriend is not here tonight," she joked before a smooch that lasted 20 seconds.