Washington, April 23 -- The third season of the fantasy series House of the Dragon has added three new actors, reported Variety.

Actors Tom Cullen, Joplin Sibtain, and Barry Sloane have joined the cast of the Game of Thrones prequel, which is currently being filmed.

According to the publication, Cullen will play Ser Luthor Largent, Joplin Sibtain will take on the role of Ser "Bold" Jon Roxton, and Barry Sloane will appear as Ser Adrian Redfort.

The new characters are expected to bring more drama and action to the world of Westeros. The show is set about 200 years before Game of Thrones and is based on George R.R. Martin's book Fire & Blood.

The three actors join a large list of returning cast members, including Matt Smith, Emma D'Arcy...