Sex: The Annabel Chong Story is a 1999 American documentary film directed, filmed and produced by Canada-based producer Gough Lewis, edited by co-creator Kelly Morris, and produced by Peter Carr.

The film profiles pornographic film actor Grace Quek, a.k.a. Annabel Chong, then a gender studies student at the University of Southern California, famous for setting a gang bang record in January 1995. A video of the event was released under the title The World's Biggest Gang Bang.

After release, Quek criticised Lewis for misconstruing multiple events and portraying events in a "misleading" way, such as claiming to have 'returned' to the industry after going to Singapore or the fact that producer Lewis self-harmed off-camera.