Which Harry Potter film features the series’ first appearance of Gary Oldman as Sirius Black?

Harry Potter and the Prisoner of Azkaban features the first appearance of Gary Oldman as Sirius Black.

Sirius is introduced as a dangerous escaped prisoner who supposedly betrayed Harry’s parents. The film gradually reveals that this public story is false and that Sirius was a close friend of James and Lily Potter.

Gary Oldman continued playing Sirius in later films, including Harry Potter and the Goblet of Fire, Harry Potter and the Order of the Phoenix, and Harry Potter and the Deathly Hallows – Part 2. His performance helped make Sirius one of the story’s most important adult characters.

The Prisoner of Azkaban was directed by Alfonso Cuarón. It was the third film in the series and the first to replace Chris Columbus as director.