New York, Dec 06 : Charlize Theron got the last laugh over the bogus tabloid story, which recently stated that her boyfriend Sean Penn had allegedly cheated on her.

The tabloid reported that the 54-year-old actor checked into the Sunset Tower hotel West Hollywood on Nov. 14 with a "hot" woman in her 20s, however, the hottie was Theron herself, the New York Post reported.

The 39-year-old actress went to the hotel for some alone time with Penn, away from her 2-year-old son Jackson and her mother Gerda, who was visiting from South Africa.

Sources revealed that Theron was happy and cool about being the mysterious 20-year-old lady. (ANI)