Lily Chloe Ninette Thomson (born 5 April 1989), better known by her stage name Lily James, is an English actress. She is best known for her role as Lady Rose MacClare in the period drama ''Downton Abbey''. James began her professional acting career as Ethel Brown in the 2010 BBC production of ''Just William''. In 2011 and 2012, she earned warm reviews in several London theatre productions.
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