In 2000, he was back in Liverpool as an unemployed shipyard worker, father of three, including the protagonist, in the film Liam.[4] His best-known role, however, is perhaps that of Professor Quirrell in Harry Potter and the Sorcerer's Stone (2001). He also provided the voice and motion capture for the computer-generated face of Lord Voldemort.[3][1]
In 2003, Hart and fellow actor Linus Roache fasted for three months and lost 2 stones each, to achieve a malnourished look for the filming of Blind Flight, where he played Middle-Eastern hostage Brian Keenan.[6]
In 2011, he played Adolf Hitler in the BBC drama The Man Who Crossed Hitler.[8]
In 2015, he landed the role of Father Beocca in The Last Kingdom and remained as a main character until the end of series 4 in 2020.[3]
In 2018, he starred as Sailing Master Thomas Blanky in the AMC produced series The Terror.[1]
In 2022, Hart was back in Liverpool playing drug dealer Carl Sweeney, in the BBC One British police drama series The Responder alongside Martin Freeman.[1]
Personal life
In order to relax, and control his twitchy hyperactivity, Hart has participated in the art of both yoga and kung-fu.[6]