Once A Tree are a Canadian music duo consisting of married couple Hayden and Jayli Wolf. The Wolfs were both raised Jehovah's Witnesses in British Columbia, and met online through mutual friends. Jayli decided to leave the religion and convinced Hayden to join her. The pair moved to Toronto together and married in 2012.

Once A Tree debuted with a self-titled EP Once A Tree, and the single "Light Me Up" in 2013. Their first professional EP, Thousand Lives, was released in 2015 under Toronto-based Foreseen Entertainment. It followed the release of the single "Howling", inspired by their childhood religion.

They continued working with Foreseen, going on to release their first album Phoenix in 2017. Rolling Stone named them "New Artists You Need to Know" and compared them favourably to Phantogram, Crystal Castles, and Chvrches. Phoenix won Best Electronic Music Album at the 2018 Indigenous Music Awards.

For the album’s single "Breakdown", which Hayden based on his own mental health crisis and dedicated to his late brother who took his own life earlier that year, Once A Tree partnered with Kelowna General Hospital for their Not Alone Campaign. Proceeds went towards establishing mental health facilities for youth in British Columbia.

The duo released their second album Fool's Paradise independently in 2020. Fool's Paradise was described as more lighthearted than their previous work, which Hayden attributed to coming "to a much happier place in life". The single "Rush" was filmed in Los Angeles, and the acoustic version featured Boy Pape.

Jayli also acts and releases solo music, such as "Child of the Government" about her First Nations father being taken in the Sixties Scoop; Hayden is a visual artist and photographer. They co-write most of their songs, and produce most of their music videos themselves.

In 2021 Jayli and Hayden released a short three track EP titled The Good, The Bad. They went on to release another EP, I Wonder How This Ends, in 2024, which incorporated their 2023 single “Skull Candy” and 2024 single “Perfection”. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.