Charlize Theron
Theron at the 69th annual Golden Globe Awards in Beverly Hills, California January 15, 2012.

If you thought the Charlize Theron sex tap was another embarrassing moment for another celebrity - not unlike Kim Kardashian and Tulisa Contostavlos - get ready for a laugh!

Apparently the whole incident was an April Fool's Day prank, associated with US-based Web site Funny or Die; to see the video, click here...

The tape starts with the Academy Award-winning actress saying: "Oh my God, I'm so nervous. I've never made a sex tape before. I hope nobody sees this that's not supposed to see this."

According to The Sun, the actress then takes a dig at celebrities like Tulisa and Kim and appears to order men dressed in bondage gear before saying: "Move over Paris and Kim 'cause I'm into some real kinky s**t."

Towards the end of the tape, she says: "Cry for me. Cry for me louder", and is then seen moaning on the bed.

So how many people did Theron manage to fool?