​From Wikipedia, the free encyclopedia. Helen Buday  (born 1962) is an Australian theatre, TV, movie actress and singer. She appeared as "Savannah Nix" in the film Mad Max Beyond Thunderdome. She was awarded Best Actress at the 48th Valladolid International Film Festival in 2003 for her role in Alexandra's Project. Description above from the Wikipedia article Helen Buday, licensed under CC-BY-SA, full list of contributors on Wikipedia