Sewell was born the son of Jo, a Welsh artist and classically trained pianist. His Anglo-Australian father, William John Frederick Sewell (1924–1978), was born in Australia to English parents and worked as an animator o… See more

After graduating, Sewell was set up with an agent by Judi Dench, who had directed him in a play while at the Central School of Speech and Drama. His breakthrough year was in 1993, in which he starred as the unpleasant … See more

Sewell has been married three times. His first wife was his long-term girlfriend, Australian fashion journalist Yasmin Abdallah; they were married in 1999 and divorced in 2000. He married his second wife, script… See more