Sean Penn wins best actor Oscar for "Milk" - Photos

LOS ANGELES (Reuters) - Sean Penn took home the Oscar for best actor on Sunday for his portrayal of slain San Francisco gay rights activist Harvey Milk in the movie "Milk" and used his win to defend the right of same-sex couples to wed.

Penn, 48, picked up the second Oscar of his career, the first being his 2004 win for his lead role as a grieving father in "Mystic River."

Sean Penn wins best actor Oscar for "Milk" pictures,Sean Penn wins best actor Oscar for "Milk" stills,Sean Penn wins best actor Oscar for "Milk"