Albus Dumbledore works at a school for students.
Albus Dumbledore . For most of the series , he is the headmaster of the wizarding school Hogwarts . After Harris ' death , Michael Gambon portrayed Dumbledore for all of the remaining Harry Potter films . Harry Potter (character) . Thus , he attends Hogwarts School of Witchcraft and Wizardry to practise magic under the guidance of the kindly headmaster Albus Dumbledore and other school professors . Harry Potter and the Chamber of Secrets (film) . The film is also the last film to feature Richard Harris as Professor Albus Dumbledore , due to his death that same year . Michael Gambon . Gambon has played the eponymous mystery writer protagonist in the BBC television serial The Singing Detective , Jules Maigret in the 1990s ITV serial Maigret , and Professor Albus Dumbledore in the final six Harry Potter films after the death of previous actor Richard Harris .