Who played Dumbledore in the first Harry Potter film?
Fantastic Beasts: The Crimes of Grindelwald
Jude Law was cast as Albus Dumbledore after director David Yates decided that the role should be played by a younger actor, not Michael Gambon (who played the role in six of the "Harry Potter" films). A number of other actors were considered, including Christian Bale, Benedict Cumberbatch, Mark Strong, and Jared Harris (son of Richard Harris, who played Dumbledore in the first two "Harry Potter" films).
Harry Potter and the Prisoner of Azkaban (film)
The film stars Daniel Radcliffe as Harry Potter, alongside Rupert Grint and Emma Watson as Harry's best friends Ron Weasley and Hermione Granger. It also features well-known actors in supporting roles, including Gary Oldman as Sirius Black, David Thewlis as Remus Lupin, Michael Gambon (in his debut in the role of Albus Dumbledore), Emma Thompson as Sybill Trelawney and Timothy Spall as Peter Pettigrew. It is the sequel to "Harry Potter and the Chamber of Secrets" and is followed by "Harry Potter and the Goblet of Fire".