Complex sentence: In 2013, Rheon was cast as the villainous psychopath Ramsay Snow in the HBO series "Game of Thrones", and Ash Weston in the ITV sitcom "Vicious".
Split into simpler sentences: In 2013, Rheon was cast as the villainous psychopath Ramsay Snow in the HBO series "Game of Thrones". He also portrayed Ash Weston in the ITV sitcom "Vicious".