to May 2009 he appeared in the play Three Days of Rain at the Apollo Theatre, London with actors Lyndsey Marshal and James McAvoy. In November and December 2009 he appeared in Public Property by Sam Peter Jackson at the Trafalgar Studios. In May and June 2010, Harman appeared in the stage production of True West at the Crucible Theatre, Sheffield. From May 2011 to February 2012 he played Lord Farquaad in the West End production of Shrek the Musical, at the Theatre Royal, Drury Lane. For his performance, he won the Olivier Award for Best Supporting Performance in a Musical and Theatregoers' Choice Award for Best Supporting Actor in a Musical. In July 2012 he played Sir Charles Surface in The School for Scandal at the Theatre Royal, Bath. From September 2012 to January 2013 he starred alongside Rob Brydon and Ashley Jensen in Alan Ayckbourn's A Chorus of Disapproval at the Harold Pinter Theatre in the West End. In August 2013, it was announced Harman would play the role of Simon Cowell in the West End musical I Can't Sing! The X Factor Musical, which opened in February 2014 at the London Palladium. Despite positive reviews, the musical closed in May. Also in 2014, Harman was revealed as the director for the UK tour of Shrek The Musical, which opened in July in Leeds and finished in February 2016 in Salford. The tour resumed in Edinburgh in December 2017. In October 2016 he directed a double-bill Lunch and The Bow of Ulysses by Steven Berkoff at the Trafalgar Studios. From January to February 2017, Harman starred in the French comedy What's in a Name? at the Birmingham Repertory Theatre alongside Sarah Hadland, Jamie Glover, Olivia Poulet and Raymond Coulthard. Harman directed the London premiere of the musical Big Fish, starring Kelsey Grammer, which played at The Other Palace in November and December 2017. From February to April 2019, Harman toured the UK in David Mamet's play Glengarry Glen Ross opposite Mark Benton. Harman played the lead as Robert Langdon in the stage adaptation tour of Dan Brown's The Da Vinci Code. The tour opened on 10 January 2022 in Bromley. Film and television work Harman's success on television and stage has facilitated a move into other television and film roles. In 2006 he played the leading role in one-off drama thriller The Outsiders, co-starring actors Colin Salmon and