Ian Hart  Ian Hart (born Ian Davies; 1964) is an English actor. He is perhaps best known for his roles as Rabbit in the Channel Four drama miniseries "One Summer" (1983), Joe O'Reilly in the biopic "Michael Collins" (1996), Quirinus Quirrell in the fantasy film "Harry Potter and the Philosopher's Stone" (2001), and Kester Gill in the E4 series "My Mad Fat Diary" (2013–2015). Hart was born Ian Davies in the Knotty Ash district of Liverpool, one of three siblings, and was brought up in a Catholic family. He attended Cardinal Heenan Catholic High School in Liverpool's West Derby suburb and was a member of the city's Everyman Youth Theatre in his teens, before studying drama at the now-defunct Mabel Fletcher College of Music and Drama. From 1988 to 1991, Hart studied video production at South Mersey College (now part of Liverpool Community College). Hart portrayed a POUM militia volunteer in the Spanish Civil War in "Land and Freedom" (1995) and an unemployed Liverpool shipyard worker in "Liam" (2000). His best known role, however, is perhaps that of Professor Quirrell in "Harry Potter and the Philosopher's Stone" (2001). He also provided the voice of the CGI-generated face of Lord Voldemort. Hart has played John Lennon in three productions: as a 22-year-old Lennon a few months prior to the late 1963 British Invasion in "The Hours and Times" (1991), a slightly younger Lennon during The Beatles' 1960-62 in "Backbeat" (1994), and a 50-year-old Lennon (having avoided his true fate at age 40) in the "Playhouse Presents" television production "Snodgrass" (2013). Hart played Sir Arthur Conan Doyle in the film "Finding Neverland" in 2004, having already played Doyle's creation Dr Watson in a BBC One television film of "The Hound of the Baskervilles" in 2002, and reprising the role in 2004 in "Sherlock Holmes and the Case of the Silk Stocking", with a different actor playing Sherlock Holmes. He also played schizophrenic paparazzo Don Konkey in the FX series "Dirt" in 2007 and 2008. In 2009 he played Tom Ripley in BBC Radio Four's adaptations of all five of Patricia Highsmith's "Ripliad" series. Hart had an interesting audience interaction during the Duke of York's Theatre's 2009 production of Andrew Bovell's play "Speaking in Tongues".