Patrick O'Kane is an Irish actor born in Belfast. He has appeared in TV shows such as The Borgias and The Fall. He's also been in films Exorcist: The Beginning and the Danish film Rembrandt alongside fellow Game of Thrones cast member Nikolaj Coster-Waldau. In Game of Thrones he portrayed Jaqen H'ghar after the character had changed his appearance. He joined the cast as a guest star in the second season.