The Turnbull Stakes is a Victoria Racing Club Group 1 Thoroughbred horse race, for horses four years old and older, run under set weights with penalties conditions over a distance of 2,000 metres. The race is held at Flemington Racecourse, Melbourne, Australia in early October. Total prize money is A$1,000,000.

Makybe Diva is a champion Australian Thoroughbred racehorse who is the only horse to win three Melbourne Cups and the only mare to win it more than once. She achieved the feat in 2003, 2004, and 2005. She also won the 2005 Cox Plate. She was the highest stakes-earner in Australian history, winning more than A$14 million.