Warne began her acting career at the age of 9, when she appeared in a commercial for Kellogg's. She then went on to star in a number of short films and television shows, before landing the role of Lily Butterfield in Grange Hill in 2011. She played the role for three years, and left the show in 2014.
In 2015, Warne joined the cast of Wolfblood as Jodie Allen. She played the role for two years, and left the show in 2017.
Since leaving Wolfblood, Warne has continued to act in television shows and films. She has also appeared in a number of stage productions.
In addition to her acting career, Warne is also a model and influencer. She has a large following on social media, and she often shares photos of her everyday life.
Warne is currently based in London, England.