In 2013, Miller appeared in Cycle 20 of the CW Network reality television show America's Next Top Model, in which she competed against fifteen other aspiring models. In the competition, Miller was one of the front-runners, having never placed below fifth after the first panel, where she was placed tenth. She was one of the strongest of her cycle, having won a total of five challenges and received six first call-outs. Also, Miller's photograph from the paint photoshoot was deemed by Tyra Banks as one of the best produced in the history of the show. In Week 8, Miller failed to book any shows during LA Style Fashion Week. At the final runway show in Bali, Miller faced difficulty when she accidentally stumbled with her stilettos on her gown. Despite this, the judges were still impressed by her walk. At the final deliberation, the judges noted Miller's command on the runway, her fluidity, as well as her high-fashion and girl-next-door appeal. She would eventually beat fellow competitor Marvin Cortes in the season finale, becoming the twentieth winner of America's Next Top Model.
Miller was born in Olympia, Washington . In 1993, Miller's family relocated to Bend, Oregon where she was raised with her two sisters. Prior to her appearance on America's Next Top Model , Miller studied at Mountain View High School in Bend.  She was previously signed to Code Model Management in New York .