Crystal Yu is a Hong Kong-British television, film and stage actress. She played Lily Chao on the British BBC medical drama Casualty from 2013 to 2017. Yu, born in Hong Kong, came to London at the age of 11 when she was offered a place at the Elmhurst School of Dance and Performing Arts (formerly known as Elmhurst Ballet School). As well as acting in theatre, films and TV, she gives up her spare time to work closely with The Royal Academy of Dance and The Jack Petchey Foundation, bringing danc...