The remarkable life of the Hollywood siren who pioneered groundbreaking scientific inventions that paved the way for wifi and Bluetooth will be told in a new film. Hedy Lamarr, considered by her show business peers to be the most beautiful woman in the world during the 1940s and 50s, starred alongside the likes of Spencer Tracy, James Stewart and Clark Gable during her glittering acting career. But she was also a brilliant scientist who helped devise a frequency-hopping system which eventually formed the foundation for modern technologies such as wifi, GPS and Bluetooth.