Question: What famous movie series did the star of BBC's One Child play a supporting role in?
Related documents: [0]  [DOC] Katie Liu Leung (born 8 August 1987) is a Scottish film, television, and stage actress. She played Cho Chang, the first love interest for lead character Harry Potter in the Harry Potter film series. In 2012, Leung made her stage debut in the play "Wild Swans". Leung has an interest in painting and photography and studied art and design at the University of the Arts, London. [END] 
[1]  [DOC] One Child is a BBC drama series part of the BBC's China season, shown over three sixty minute episodes. The series follows a girl called Mei Ashley (Katie Leung) who discovers that she has a brother, Li Jun (Sebastian So) that she never knew about and that he is due to be sentenced to death for a murder he did not commit. [END] 
Answer: 
Harry Potter
Harry Potter