The people who made Fugitive Pieces had auditioned more than 150 boys before finding 10-year-old Robbie, who had been living in Prague for two years. He spent a year studying acting, singing, and dancing at one of Britain's Stagecoach theatre schools. Kay appeared in the 2008 miniseries Pinocchio, playing the title character. After finishing Pinocchio, he went on to play Sam, a boy diagnosed with leukemia in Ways To Live Forever screening in late 2010. He appeared in Pirates of the Caribbean: On Stranger Tides, playing the Cabin Boy. More recently, he portrayed Peter Pan in Once Upon a Time.