Kate Winslet Smoulders in Sultry Photoshoot for St. John (PHOTOS)

Oscar-winning actress Kate Winslet looked stunning as she showed off her feminine curves in St. John's Spring 2012 advertising campaign.

Shot by photographer Craig McDean in a sleek modern penthouse in Chelsea Arts Tower, the mother of two appeared effortlessly beautiful in various images of the cinematic style campaign.

"Kate embodies the elegance of St. John woman," said Creative Director George Sharp. "Her continued support in the brand and women's receptiveness to her beauty and extraordinary body of work are just some of the reasons to continue on with our relationship and decision to work together for our Spring 2012 Ad campaign," he added.

Started in the year 1962, the luxury brand is known for its sportswear and knitwear collections featuring an effortless, enduring style. The brand has, over the years, evolved from a family run operation to a global luxury brand featuring cool classics and chic, easy pieces.

"What I love is that the lines are a lot more relaxed and yet at the same time they still give shape. So you still get those lovely feminine curves which to me are very important," Winslet said.

Further praising the collection's flattering cuts, the actress mentioned that a person doesn't have to be a size 2 or even a size 4 to be able to wear these garments because they fall so well, they're cut for women with a shape.

Take a look at St. John's Spring 2012 advertising campaign featuring Kate Winslet in the images given below: