Michael Culkin is an Irish actor best known as Judge Buller in the BBC's Garrow's Law (2009). He appears in the new BBC 2 series, Witchfinder and recently completed filming Surprised by Oxford. He appears in Sean Durkin's 'The Nest', opposite Jude Law and Carrie Coon. He appears in Bridgerton as Lord Rutledge, and appeared as Rab Butler in both seasons of The Crown (2016), in The Iron Lady (2011) with Meryl Streep, opposite Johnny Depp in Mortdecai (2015) and with Hugh Grant in A Very English Scandal (2018) playing the Conservative politician Reginald Maudling. He appeared in two seasons of Poldark (2015) as Horace Treneglos. He appeared in The Long Song (2018) with Jack Lowden and Hayley Atwell for the BBC. He has extensive BBC, ITV, Netflix Television credits as well as work at the National Theatre and in the West End where he starred with Maggie Smith in Alan Bennett's The Lady in the Van. He is a member of the British Academy of Film and Television Arts and the Society of Artists Potters & Poets.