Monica was born in March 1969 into an Irish family and has a sister Gabrielle. She studied drama at the Guildhall School in London, graduating in 1991 and soon afterwards went into television. A supremely versatile character actress, she has tended to specialize in stunning portrayals of the darker side of life, as real-life stalker Maria Marchese in U Be Dead (2009), demure but deadly Miss Gilchrist in the superior Poirot adaptation After the Funeral (2006) and, particularly, as serial killer R...
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