Thomas Cullen is a Welsh actor and director. He had roles in the independent film Weekend, as Anthony Foyle, Viscount Gillingham in the television series Downton Abbey, and as Sir Landry in the historical drama series Knightfall. From Wikipedia
Tom Cullen, Joplin Sibtain, and Barry Sloane join the ensemble as production continues in the U.K. under Ryan Condal and George R.R. Martin's leadership.
