Missoni, who had been a track star before the war, represented Italy at the 1948 London Olympics. While in London he met Rosita Jelmini, who was there taking an English-language course.
Missoni also designed the uniforms the track team wore in the 1948 games. In 1999, dressed in a uniform like the one he designed for the London games, the designer was photographed alongside three Italian Olympic gold medalists in the 400 m hurdle race. From left, Salvatore Morale, Missoni, Roberto Frinolli, and Fabrizio Mori.