Elizabeth Sinclair Miller (born 27 February 1957) is a British physician, surgeon, campaigner and writer noted for her outspoken stance on mental health, and bipolar disorder (manic depression) in particular. Although she has a long history of television and radio appearances, she came to public prominence in Stephen Fry's Emmy Award-winning documentary The Secret Life of the Manic Depressive in 2006. In 2008 she was voted Mind Champion of the Year by public poll.