Hedy Lamarr selling U.S. War Bonds during World War II.
Lamarr wanted to join the National Inventors Council, but was reportedly told by NIC member Charles F. Kettering and others that she could better help the war effort by using her celebrity status to sell war bonds.
Hedy participated in a war-bond-selling campaign with a sailor named Eddie Rhodes. Rhodes was in the crowd at each Lamarr appearance, and she would call him up on stage. She would briefly flirt with him before asking the audience if she should give him a kiss. The crowd would say yes, to which Hedy would reply that she would if enough people bought war bonds. After enough bonds were purchased, she would kiss Rhodes and he would head back into the audience. Then they would head off to the next war bond rally.
Hedy Lamarr: The Genius Inventor Hollywood Refused to Take Seriously
Hollywood called her "the most beautiful woman in the world." She spent her nights at the piano solving a wartime engineering problem the U.S. Navy couldn't crack.