Luke Roberts (born 5 October 1977) is an English actor, known for his role as Joseph Byrne in the BBC One medical drama series Holby City. He had a principal role in the short-lived third series of the soap opera Crossroads, and appeared as Captain Dan Pieterson in the Sky1 drama Mile High and starred in the third and fourth seasons of Black Sails.
In 2016, Roberts joined the cast of the HBO series Game of Thrones in the sixth season as Ser Arthur Dayne.