In 2004, Turner went on to audition for the role of Demi Miller on the BBC soap opera "EastEnders". Though she failed to get that part, she was instead given the role of Stacey, a new addition to the popular Slater family. She started in the soap the day after leaving school, and made her first appearance on-screen in November 2004. Turner speaks with Received Pronunciation, and had to affect a cockney accent for the role. Commenting on the role, Turner said: "I always dreamt of being on the show and so I can't believe that I've fulfilled my greatest ambition!" Since joining the show, her character has featured in numerous high-profile storylines, including abortion, drug abuse, a troubled relationship with her mother, discovering she has bipolar disorder, an affair with her father-in-law and the murder of her rapist Archie Mitchell (Larry Lamb).