Professor Albus Percival Wulfric Brian Dumbledore is a fictional character in J. K. Rowling's Harry Potter series. For most of the series, he is the headmaster of the wizarding school Hogwarts. As part of his backstory, it is revealed that he is the founder and leader of the Order of the Phoenix, an organisation dedicated to fighting Lord Voldemort.
Dumbledore was portrayed by Richard Harris in the film adaptations of Harry Potter and the Philosopher's Stone (known as Harry Potter and the Sorcerer's Stone in the USA) and Harry Potter and the Chamber of Secrets. After Harris' death, Michael Gambon portrayed Dumbledore for all of the remaining Harry Potter films. Jude Law portrayed Dumbledore in the prequel film Fantastic Beasts: The Crimes of Grindelwald.
Rowling stated she chose the name Dumbledore, which is a dialectal word for "bumblebee", because of Dumbledore's love of music: she imagined him walking around "humming to himself a lot".