Jade Elizabeth Bird was born in Hexham, Northumberland, where she lived until she was two. Bird and her family moved to London when she was two years old, and lived on a military base in Germany when she was five. She later moved to Bridgend, South Wales, with her mother, after the divorce of her parents, which occurred when Bird was 12. It was during this time in Wales, living with her mother and grandmother (who had also been through a divorce), that Bird began to write acoustic-based songs. At age 16, Bird began attending the BRIT School in Croydon, which she graduated from in 2016. While at the BRIT School, she performed at gigs several times a week. During her Piano Session with Huw Stephens on BBC Radio 1 in October 2017, she noted that she had travelled around as a child due to being in an Army family. She lived in South Wales, Chesterfield and Mönchengladbach, Germany, which had a big influence on her music.