Wigmore was born in Auckland, New Zealand to Peter and Adrienne Wigmore. She has two older siblings: brother Oliver Wigmore and sister Lucy Wigmore, a professional actress known for starring as Justine Jones in the long-running New Zealand soap opera Shortland Street and a role in Underbelly: Razor. She married Jason Butler, ex-lead singer of the band Letlive and currently lead singer of Fever 333, during a private ceremony in Hawaii in September 2014. The couple's first child, Pascal Nashoba Butler, was born on 7 September 2017. Her second son, Izaiah River Butler, was born on 20 March 2020.
