Callum Wharry is a child actor from Northern Ireland who played Prince Tommen Baratheon. Game of Thrones is his first acting experience. He initially appeared as a guest star in the first season and returned in this role for the second season. He did not appear in the third season. For season 4, Dean-Charles Chapman, who had previously played Tommen's cousin Martyn Lannister, took over the role of Tommen.