Complex sentence: Ellen Wong is a Canadian actress, known for her role as Knives Chau in the film "Scott Pilgrim vs. the World" and as Jill "Mouse" Chen in The CW's series "The Carrie Diaries".
Split into simpler sentences: Ellen Wong is a Canadian actress best known for her role as Knives Chau in the film "Scott Pilgrim vs. the World". She stars as Jill "Mouse" Chen on The CW's series "The Carrie Diaries".