Sexy actress Charlize Theron has stripped off for her latest project - a Japanese body wash commercial.

The South African beauty has joined the ranks of a huge number of stars who have taken big pay-cheques to shoot advertisements which rarely escape out for the rest of the world to see.

A source who worked on Theron's project tells American tabloid the STAR, "We see Charlize leaving a movie premiere and going back to her hotel room.

"She undresses completely. You can see her from the back. She goes outside to a pool and lathers herself up with LUX. It's ridiculous."