Emma Stone may be the latest celebrity to have their sex life laid bare if a RadarOnline report on a possible pre-fame sex tape is to be believed.

According to the gossip site, a "close pal" is claiming that, at some point prior to her breakout role in Greg Mottola's 2007 comedy Superbad, Stone starred in a sex tape with an unnamed partner.

"She made it long before she started dating Andrew Garfield, and before she really became a household name," the source is quoted as saying. "She was just young and probably thought nothing would ever come of it."

Where is the tape now? "In the hands of the person she made it with," said the insider, who wouldn't speculate on the likelihood of its release except to say that "the higher Emma's star rises, the more valuable that tape becomes."

[photo via AP]