Katie Leung is a Scottish actress, best known for playing Cho Chang in Harry Potter and the Goblet of Fire, Harry Potter and the Order of the Phoenix, and Harry Potter and the Half-Blood Prince.

Leung was born in Motherwell, North Lanarkshire to Peter, who was a businessman and lawyer, and Kar Wai Li Leung, who was a neurologist. Her parents are now divorced, and she currently resides with her father (a native of Hong Kong), two brothers, and a sister. She attended one of Scotland's most prestigious private schools, Hamilton College. Currently, she is attending University of the Arts London. She's currently residing in Battersea, South London.

Leung has been named as Scotland's most stylish female and as the hottest Scotswoman by The Scotsman. She has also been featured in Teen Vogue and in Evening Standard.

Leung's father saw an advertisement for a Harry Potter and the Goblet of Fire casting call, and suggested she should try out. She waited four hours in line for a five-minute audition, and said that she would rather be shopping than stand in line for a role she was almost certain she wouldn't get. Two weeks later, she was called back for a workshop and was cast as Cho Chang, in the process beating out over 4,500 other girls for the part, among them actresses Courtney Webb and Michelle Ang. She stated in an interview with the Daily Record that her Scottish accent probably gave her an edge in the casting.

Leung delayed plans to go to art college and university in order to film Harry Potter and the Order of the Phoenix, in which she and Daniel Radcliffe (Harry) shared an on-screen kiss that received much media coverage..On set Leung became good friends with fellow actresses Bonnie Wright(Ginny Weasley), Evanna Lynch (Luna Lovegood) and Afshan Azad (Padma Patil).

In July 2007, Leung was cast by Gold Label Records, a subsidiary of EMI in Hong Kong, to be the female lead in the music video Love Coming Home by Leo Ku. Leung filmed the video in London while promoting the new Harry Potter film. Leo described Leung's acting as "professional" and "mature."

Leung played Hsui Tai in the episode "Cat Among the Pigeons" of ITV1's Agatha Christie's Poirot, which premiered on ITV on 21 September 2008.

Leung has contributed her voices to the Harry Potter and the Order of the Phoenix, and Harry Potter and the Half-Blood Prince. She will reprise her role as Cho Chang in Harry Potter and the Deathly Hallows.