From Wikipedia, the free encyclopedia. Willa O'Neill is an award-winning actress from New Zealand. She is known to fans of Hercules: The Legendary Journeys for her recurring role as "Althea" and Xena: Warrior Princess fans know her from her repeat role as "Lila." O'Neill is a two-time Film Award winner at the New Zealand Film and TV Awards. Her first award, for Best Supporting Actress, came for ... show more