But Lady Kitty Spencer, 24, who has been a fixture on the red carpet in recent months, showed off a somewhat fuller figure during a day on Sydney's Bondi beach earlier this week. Wearing a tiny red string-bikini, the late Princes Diana's niece displayed her enviable figure in all it's glory as she soaked up the Australian sunshine in the company of Channel Seven weather presenter, James Tobin. Scroll down for video. Princes Diana's niece, Lady Kitty Spencer, 24, showcased her new fuller-looking killer curves in a tiny red string bikini on Bondi beach earlier this week. Lady Kitty Spencer is living it up on the beach in Australia while the rest of us layer up in lots of coats and jumpers back home.