Both Hollywood actresses have scored major campaigns, with Alba being named as the new face of jewelry label Piaget and Winslet taking over from Karen Elson as a model for the St. John fashion brand.

Alba, who recently stepped up her style game by starring in a Vogue Italia fashion spread, features in six ads for Piaget's Possession line, which were styled by Brad Goreski and shot by Patrick Demarchelier before being released on Facebook April 28. 

The star says in a behind-the-scenes video that she likes the "chic and simple" design of the jewelry as well as the idea of layering the gold, silver, and rose gold pieces on top of each other.

Meanwhile, fellow actress and Lancôme spokesperson Kate Winslet has been tapped as the new face of St. John, which previously featured the likes of Angelina Jolie - set to appear in a new Louis Vuitton campaign this summer - or Gisele Bundchen in its ads. According to Women's Wear Daily, photographer Craig McDean was shooting the pictures in New Jersey April 28. /