Dunn made her runway debut in the New York shows in the fall of 2007, walking in shows for Marc Jacobs and Polo Ralph Lauren, among others. In 2007, she was featured on British Vogue as a “new star,” and in 2008 Style.com listed her as one of the top 10 newcomers.
In July 2008, Steven Meisel selected Dunn to appear on the cover of the Vogue Italia issue devoted entirely to black models. She has also been featured on the cover of American Vogue, British Vogue and Teen Vogue, as well as covering i-D, Elle, Pop, Russh, Muse, The Sunday Times Style, Ponystep, Antidote and Luella.
In November 2008, Dunn was named “Model of the Year” at the British Fashion Awards. She has garnered attention for her legs and for her walk which she says she practices frequently with very tall heels, walking over 60 shows during the spring 2009 season.
She has modeled for Burberry, Calvin Klein, Yves Saint Laurent, DKNY, John Galliano, Victoria’s Secret, Tommy Hilfiger, Topshop, Jaeger, Rag & Bone, Gap, Aldo, Shiatzy Chen, Benetton, H&M, Banana Republic, Neiman Marcus and Saks Fifth Avenue, and is the face of Rihanna‘s collections for River Island. — Source