Ainsley was discovered by a Premier model scout in Oxford Street in 2002 while shopping. Ainsely quickly signed with other top agencies including Elite Models in New York, Elite Models in Miami, Elite Models in Barcelona, Elite Models in Amsterdam, Joy Models in Milan, Modelwerk in Hamburg, Starz People in Hong Kong, Heffner Management in Seattle, and IQ Models in Istanbul. In 2003, Ainsley was in the music video for Darius Danesh's song "Colourblind." Subsequently, the two began dating which landed Ainsley in the glossies. The media attention only helped Ainsley's career helping her land numerous editorials as well as a Day & Night cover.
Since then, she has landed campaigns with Lynx, Samsung, Sunsilk, Virgin Atlantic, ASOS, Myla Lingerie, Swissotel, Tia Lusso, Elle McPherson, as well as being featured in the opening credits for the James Bond film Die Another Day. She has appeared in editorials for Tatler, Night & Day, Essentials Magazine, Cosmopolitan, and Once. She has graced the covers of Night & Day, Stuff, The Sunday Times Travel, You Magazine, GP Live as well as modeling book. "A Model for Living"
Since then, she has landed campaigns with Lynx, Samsung, Sunsilk, Virgin Atlantic, ASOS, Myla Lingerie, Swissotel, Tia Lusso, Elle McPherson, as well as being featured in the opening credits for the James Bond film Die Another Day. She has appeared in editorials for Tatler, Night & Day, Essentials Magazine, Cosmopolitan, and Once. She has graced the covers of Night & Day, Stuff, The Sunday Times Travel, You Magazine, GP Live as well as modeling book. "A Model for Living"