He showed up to audition for a minor part on The Walking Dead and walked out as the lead. Before that, he'd spent years as a reliable British TV fixture, known at home for This Life and to anyone else as the lovelorn guy with the cue cards in Love Actually. Casting a British actor as Rick Grimes, the all-American sheriff of the zombie apocalypse, was a gamble that paid off. He spent nine seasons making it look obvious and took the Saturn Award for TV best actor twice.
He left The Walking Dead in 2018 because eight months a year in Atlanta kept him from his family in London. Walking away from the lead role in one of cable TV's biggest franchises wasn't a move many would make. AMC kept the door open and he came back in 2024 for the six-episode spinoff The Ones Who Live, reuniting with Danai Gurira. Whether Coldwater, his ITV thriller for Paramount+ with Showtime, redefines him or just confirms he was always a character actor playing a lead is the more interesting question.
His actual surname is Clutterbuck, which alone explains the stage name. He married Gael Anderson in 2006, who is the daughter of Ian Anderson, frontman of Jethro Tull. Apple Martin served as flower girl at the wedding, which places the whole event in a very specific orbit of British rock-adjacent celebrity. He met Gael on the Teachers set in 2001, where she worked crew while he played the lead. He has said he doesn't really manage his own social media.