Early in her career, she appeared in television commercials for Old Navy, Verizon, Logitech and Neutrogena. She made her television acting debut in an episode of Complete Savages, in 2005. In 2007, Stevens West began portraying Ashleigh Howard on the ABC Family comedy-drama television series Greek. In a review released soon after the premiere of the show, the Pittsburgh Post-Gazette called the show "light-hearted fun" and "authentic" while The New York Times claimed that Greek "captures the spirit of the hedge-fund age like nothing else." The series concluded after four seasons on March 7, 2011. She has appeared in films The Fast and the Furious: Tokyo Drift (2006), Fired Up! (2009), The Amazing Spider-Man (2012), The Kitchen (2012) and Jessabelle (2014).