Hedy Lamarr, ca 1945/1946

Predating Elizabeth Taylor as being hailed the most beautiful woman in the world in her prime, Hedy Lamar may not have been much of an actress, but she was credited for having depicted on screen the first ever simulation of an orgasm and appearing nude (through deception by the director) in the film "Ecstasy" in 1933, a time when screen nudity was never heard of.