Paris's isolated situation in the 1940s enabled the Americans to exploit the ingenuity and creativity of their own designers. Among young men in the War Years the zoot suit (and in France the zazou suit) became popular. Many actresses of the time, including Rita Hayworth, Katharine Hepburn, and Marlene Dietrich, had a significant impact on popular fashion. The couturier Christian Dior created a tidal wave with his first collection in February 1947. The collection contained dresses with tiny waists, majestic busts, and full skirts swelling out beneath small bodices, in a manner very similar to the style of the Belle Époque. The extravagent use of fabric and the feminine elegance of the designs appealed greatly to a post-war clientèle and ensured Dior's meteoric rise to fame.