Stella McCartney leads tributes to ‘inspiring’ model Stella Tennant PA Naked Heart Foundation Fabulous Fund Fair - London Stella McCartney has led tributes to Stella Tennant, who has died aged 50. The aristocratic model died five days after her 50th birthday on December 17. McCartney said she will miss her "terribly". "My heart goes out to your stunning family who must be in such underserving pain. "I am speechless... Rest in peace, you inspiring woman. "Your soul and inner beauty exceeded the external perfection, Stella." The granddaughter of the 11th Duke of Devonshire, Andrew Cavendish, and Deborah Mitford, Tennant rose to fame in the 1990s, walking the runway for designers including Versace and Alexander McQueen.