The ad, which is being filmed near the Eiffel Tower in Paris this week, is being made to promote a new Dior fragrance.
Law has appeared in several Dior campaigns over the past two years, including two TV ads to promote Dior Homme Sport and Dior Homme Intense. Actress Sharon Stone has previously starred in ads for Dior's female fragrances.
The British actor has also been the brand ambassador for menswear and accessories company Alfred Dunhill since 2007, last featuring in a campaign for the brand's Spring/Summer 2009 range.
Law and the 'Lock, Stock and Two Smoking Barrels' director have previously worked together on Ritchie's reinterpretation of 'Sherlock Holmes'.