WATCH: Billie Jean King Talks Self Confidence and the Evolution of Women in Sports

Tennis legend Billie Jean King visited the Empire State Building to celebrate the Women's Sports Foundation's 50th Anniversary with a special tower lighting ceremony and tour of the iconic Observatory Experience.

Just before she flipped the famous switch, Billie Jean sat down to discuss her historic "Battle of the Sexes" match against Bobby Riggs and the $5,000 check that started the Women's Sports Foundation.

See the full interview below!