Emma Stone has finally hit the big time.

That's right -- there's a tape of her having sex out there somewhere.

The actress recorded a sex tape, and it's not with her current beau, Andrew Garfield, a source told RadarOnline.com. The 24-year-old starlet reportedly filmed the racy video before meeting her "The Amazing Spider-Man" co-star.

He must be thrilled.

"She was just young and probably thought nothing would ever come of it," the source said.

The X-rated tape hasn't surfaced yet. However, it's apparently not in Stone's possession. "The tape remains in the hands of the person she made it with," said the source, whom radar identified as a close friend of the actress. "But that doesn't mean there's any guarantee that it won't eventually hit the market. The higher Emma's star rises, the more valuable that tape becomes."

When will these people ever learn?

In any case, Stone won't be exploiting the scandalous reel for her benefit. "Emma's really happy with her career and proud of where she is," the source added. "There's no way she would organize the release of the tape."

Contact Tony Hicks at thicks@bayareanewsgroup.com or on Facebook at www.facebook.com/BayAreaNewsGroup.TonyHicks.