Lily James by Maarten de Boer during the 2016 Toronto International Film Festival

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, and the title role in the 2015 Disney film Cinderella.

James began her professional acting career as Ethel Brown in the 2010 BBC production Just William. In 2011 and 2012, she earned warm reviews in several London theatre productions. She began to appear in Hollywood films in 2012, with roles in Wrath of the Titans and Fast Girls, and was seen in further television roles.