Theresa Penelope "Terri" Irwin, (; born July 20, 1964) is an American-Australian naturalist, author and owner of Australia Zoo at Beerwah, Queensland, Australia. She is the widow of Australian naturalist Steve Irwin. Terri Irwin co-starred with her husband on The Crocodile Hunter, their unconventional television nature documentary series and its spin-off series, Croc Files and The Crocodile Hunter Diaries. She has lived in Australia since 1992, when she married Steve Irwin.