Professor Minerva McGonagall is a fictional character in J. K. Rowling's Harry Potter series. Professor McGonagall is a professor at Hogwarts School for Witchcraft and Wizardry and is the head of Gryffindor House and professor of Transfiguration, as well as being the Deputy Headmistress under Albus Dumbledore and a member of the Order of the Phoenix. Following Lord Voldemort's defeat at the hands of her student Harry Potter and the deaths of Headmasters Albus Dumbledore and Severus Snape, McGonagall takes the position of Headmistress. Professor McGonagall was portrayed in the film adaptations by Maggie Smith.