She and Little Mix were nominated for the 2012 Glamour Women of the Year Awards for Band of the Year. The won the award in 2014.
She was raised by her parents, James and Norma Thirlwall, and she has a brother named Karl. She dated Sam Craske from the dance crew Diversity from 2013 to 2014, then went on to date Jed Elliott from 2015 to 2019. Rapper Jordan Rizzle Stephens became her boyfriend in 2020.
She listed popstar and singer Cheryl Cole as one of her greatest idols.