[citation needed] In 2006, at the age of 16, Stephens won the nationwide Girlfriend Magazine Model search.

Stephens has also been featured in global advertising campaigns for Lacoste, Benetton, Diesel, Sephora, Alice Temperley, Forever 21, NastyGal, Nordstrom, Neiman Marcus, Minelli (France), Dynamite and Kensie, and the lingerie brands; Honey Birdette, Bras N Things, Lasenza, Agent Provocateur, and Myla.

Her Australian campaign portfolio includes David Jones, Sass & bide, Bonds, Alannah Hill, L'Oréal, Pandora, Peter Alexander, Forever New, Jag, Wrangler, Just Jeans, Ksubi, Levi's, Lisa Ho, Metalicus, Review Australia, Calibre menswear, Morrisey, Bardot, Sportsgirl, Sunsilk, Seafolly, Tigerlily Swimwear, Sunseeker Swimwear, Westfield, Willow, Wish, Witchery, and Yeojin Bae.

She walked 14 shows at her debut New York Fashion Week in September 2008, including Jason Wu, Halston.

J. Mendel and Tuleh but she is best known in the US for walking in the annual Victoria's Secret Fashion Show in Miami in 2008 a few months after her 18th birthday.