Professor Albus Percival Wulfric Brian Dumbledore is a fictional character in the Harry Potter series of novels by J. K. Rowling. For most of the series, he is the headmaster of the wizarding school Hogwarts. He is also the founder and leader of the Order of the Phoenix, an organisation dedicated to fighting the Dark wizard Lord Voldemort.
Dumbledore is portrayed by Richard Harris in the film adaptations of Harry Potter and the Philosopher's Stone (2001) and Harry Potter and the Chamber of Secrets (2002). Following Harris' death in October 2002, Michael Gambon was cast in the role. He plays Dumbledore in six Harry Potter films, which were released from 2004 to 2011. Jude Law portrays a middle-aged version of the character in the prequel films Fantastic Beasts: The Crimes of Grindelwald (2018) and Fantastic Beasts: The Secrets of Dumbledore (2022).
Source : Wikipedia