Her first major acting role was a Disney Channel UK series Life Bites. In 2010, she was cast as Mohini "Mo" Banjaree in the 2011 Disney Channel original film Lemonade Mouth, her first role in an American production. That same year, she was cast as Maddy Shannon, in the science-fiction series Terra Nova which premiered in September 2011 on Fox. The series was not renewed for a second season. In 2013, Scott appeared in the music video for the song "Hurricane", by her Lemonade Mouth co-star Bridgit Mendler. In August 2014, she independently released her debut EP Invisible Division. Scott was cast as Ryoko in Ridley Scott's The Martian. She filmed her scenes but they were removed from the final cut. Screen International selected Scott as one of their 2015 Stars of Tomorrow. In October 2015, she was cast in a co-leading role as Kimberly Hart, the Pink Ranger, in Power Rangers (2017), the film adaptation of the TV series of the same name. The film was released on 24 March 2017, and earned Scott her first Teen Choice Award nomination. In 2019, Scott starred as Princess Jasmine in a live action remake of Aladdin.