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A BBC Fact File says that she's famous for, "Being that face in British films that you recognise, but can never put a name to."
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Played Charlotte in Dirty Filthy Love which won 2005 RTS Drama Award for Best Single Drama.
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Has worked with Rufus Sewell on two BBC dramas.
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She won Best Comedy Actress at the 2004 Newport Beach International Film Festival for her work in the movie American Cousins.
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Shirley is the oldest actor to play a student in the Harry Potter films. She was 35 when she made her first appearance as Moaning Myrtle.
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Won the award for Best Actress at the 2003 Bordeaux International Festival of Women in Cinema for her role in Wilbur Wants to Kill Himself.
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Starred in 2005 movie Frozen.
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She is currently working on a movie called I Really Hate My Job with Neve Campbell.
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She claims to have seen a ghost standing at the bottom of her bed when she was in Russia.
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Shirley graduated from drama school in 1986.
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She played the lead role of Katherine in a BBC updating of Shakespeare's Taming of the Shrew as part of their Shakespeare Retold mini series.
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Shirley studied at Kirkaldy Technical College.
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Shirley has worked with famous actor Robert Carlyle on two occasions; in the television series Hamish Macbeth and in the movie Trainspotting.
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She appeared on the talent show Opportunity Knocks not for acting but for singing.
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She worked on stage as a member of England's National Theatre Company.
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Shirley is the eldest of three sisters.
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In 2003 for her work in 24 Hour Party People, Shirley was nominated for the British Supporting Actress of the Year award by the London Film Critics Circle.
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She had a supporting role in the movie '24 Hour Party People' in which she played Lindsay Wilson
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Shirley studied at the Guildhall School of Music and Drama in London.
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Shirley plays Bridget's friend Jude in the movie Bridget Jones' Diary.
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Shirley makes an appearance in 1996 movie Trainspotting.