Williams-Crosby was born in North Hollywood, Los Angeles, California. Her more notable roles include the Klingon officer Vixis in Star Trek V: The Final Frontier, and the Assassin Patrice in Buffy the Vampire Slayer story "What's My Line". Originally involved in music and dance, she switched to acting, focusing on action roles which often featured stuntwork, making use of her martial arts and athletic skills. She has also worked as a stunt coordinator, choreographing fight scenes for television and film, including Miller Lite's controversial 2002 commercial "Catfight".