Matthew John Mitcham OAM (born 2 March 1988) is a retired Australian diver and trampolinist. As a diver, he was the 2008 Olympic champion in the 10 m platform, having received the highest single-dive score in Olympic history. This made him the first openly gay athlete to win an Olympic gold medal. He is also the first Australian male to win an Olympic gold medal in diving since Dick Eve at the 1924 Summer Olympics.
Mitcham originally competed as a trampoline gymnast. He was spotted by Wang Tong Xiang, who is a coach at the Australian Institute of Sport Diving Program, while at the Chandler Aquatic Centre in Brisbane's suburbs, and Mitcham continued with both diving and trampolining for several years.
As a trampolinist, Mitcham represented Australia at the World Junior Championships in 1999 and 2001, winning the double mini-tramp event. He also competed at the Australian Youth Olympic Festival in 2003, finishing sixth.