If Michiel Huisman thinks he encountered some drama on Nashville, just wait until he arrives in Westeros.

The actor - who portrayed Liam McGuinnis on Nashville Season 1 and who HBO viewers may know as Sonny on Treme - has been cast on Game of Thrones Season 4.

In what capacity? That's the question. Nothing is known about Huisman's role at the moment.

Production on everyone's favorite epic is underway again, with new episodes scheduled to return next spring.

Other notable castings so far include:

• Roger Ashton-Griffiths as Mace Tyrell, the father of Margaery and Loras Tyrell
• Pedro Pascal as the Prince Oberyn Martell; also known as The Red Viper, the prince of Dorne.
• Indira Varma as the Prince's girlfriend, Ellaria Sand.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.