Madeleine Arthur (born March 10, 1997) is an American/Canadian actress, known for her role as young Willa Warren in the ABC drama series The Family. She portrayed Jane Keane, the daughter of Amy Adams' character, in Tim Burton's biographical film Big Eyes (2014). Arthur also has had guest roles in The Killing, The Tomorrow People, and Supernatural.
Arthur was born and raised in Vancouver, British Columbia, to Jane (née Walter) and Brian Arthur. She is a 2nd cousin of American actress Amanda Seyfried. She attended Sir Winston Churchill Secondary School, where she was the valedictorian of her graduating class. Arthur was a competitive gymnast for 13 years before changing her focus to acting. She speaks fluent French.