Celebrated as “the most beautiful woman in the world” during her Hollywood heyday in the 1940s, film star Hedy Lamarr (1914–2000) ultimately proved that her brain was even more extraordinary than her beauty. Eager to aid Allied forces during World War II, she explored potential military applications for radio technology. She theorized that varying radio frequencies at irregular intervals would prevent interception or jamming of transmissions, thereby creating an innovative communication system. Lamarr shared her concept for utilizing “frequency hopping” with the U.S. Navy and codeveloped a patent in 1941. Today, Lamarr’s innovation makes possible a wide range of wireless communications technologies, including Wi-Fi, GPS, and Bluetooth.