Robbie Kay's family moved to the Czech Republic where he saw a note for English-speaking children to be extras in a film on a school noticeboard. Despite a lack of previous acting experience, this led to him getting a speaking part in The Illusionist, but his scenes were eventually cut from the film.
After small roles in Hannibal Rising and My Boy Jack, a Canadian production company asked him to play the part of Young Jakob which involved a 9-week shooting schedule, three of which were on Greek islands. The people who made Fugitive Pieces had auditioned over 150 boys before finding the then 10-year-old Robbie Kay who had been living in Prague for two years. He spent a year studying acting, singing, and dancing at one of Britain's Stagecoach theater schools.
He appeared in a miniseries adaptation of Pinocchio, playing the title character. After finishing Pinocchio he went on to play Sam, a boy diagnosed with leukaemia in Ways To Live Forever screening in late 2010. He appeared in Pirates of the Caribbean: On Stranger Tides, playing the Cabin boy.
- Hannibal Rising (2007)
- Pinocchio (2008)
- Once Upon a Time (TV Series)
- Sleepy Hollow (TV Series)
- No Postage Necessary (2017)
- Blood Fest (2018)