Actress Nicola Peltz wasn't yet a teenager when she began training at the Professional Children's School in Manhattan. By 12, the Connecticut native had appeared in the 2006 holiday comedy Deck the Halls, and in 2008 she appeared in the comedy Harold. In 2010, Peltz scored a more high-profile role, playing young martial artist Katara in director M. Night Shyamalan's The Last Airbender, based on the popular animated series Avatar.