The actor was best known for his role as Aethelhelm in the hit Netflix series 'The Last Kingdom' Adrian starred as the antagonistic ruler who has ambitions for his grandson Aelfweard. The TV star had also made appearances in 'Doctor Who', 'Victoria' and starred alongside 'Harry Potter' actress Emma Watson in the Disney live-action version of 'Beauty and the Beast' Earlier this year, Adrian appeared in episodes of the mystery series 'Death in Paradise' and in 2023 he starred in World War Two play 'The White Factory'