House of the Dragon: Graham McTavish on Getting Into Character (Exclusive)

Graham McTavish opens up to ET’s Will Marfuggi about ‘House of the Dragon’ and his character Ser Harrold Westerling. Plus, the actor reveals what it’s like going from wearing a kilt on ‘Outlander’ to now armor. ‘House of the Dragon’ premieres Aug. 21 on HBO.