She may sparkle on the red carpet in glittering earrings, bracelets and necklaces… But Cameron Diaz’s favorite accessory these days is a watch.

The 39-year-old part-Cuban American actress is the new face of Tag Heuer‘s Link Lady collection, and she proudly shows off one of the sleek, steel styles in her first ad for the brand.

“The Link Lady is modern, sexy and elegant and I’m equally comfortable wearing it on the red carpet or in my day-to-day life,” the Charlie’s Angels actress said in a statement. “The first watch I bought was a Tag Heuer at 18,” she added.

In addition to lending her face to the campaign, her three-year partnership with Tag Heuer will also help raise awareness for UN Women, the United Nations Entity for Gender Equality and the Empowerment of Women.