#2: Jake and Maggie Gyllenhaal Played Siblings in Donnie Darko (2001)
Jake and Maggie Gyllenhaal started acting as children in films directed by their father, Stephen Gyllenhaal. Their most memorable collaboration came in Donnie Darko (2001), where they played brother and sister. Their real-life relationship gave the cult film a believable family dynamic that helped it become a lasting favorite.
