Sebastian Brown is one of the Brown children and is the youngest son in the Brown family. He is the twin brother of Christianna Brown and is around seven years old. When asking Evangeline for something he never says please until Nanny McPhee comes. He is very similar to Vincent Green from Nanny McPhee and the Big Bang. He is portrayed by Samuel Honywood.
Sebastian is small and Cheeky and is usually up to tricks with is siblings.
|Cedric Brown, Mrs. Brown, Simon Brown, Eric, Lily Brown, Tora, Sebastian Brown, Christianna Brown, Agatha Brown|