Who is the godfather of Harry Potter in J.K. Rowling’s novels?

Sirius Black is Harry Potter’s godfather in J.K. Rowling’s novels.

Sirius was a close friend of Harry’s father, James Potter, during their time at Hogwarts. He became Harry’s godfather before Harry’s birth and was part of the group resisting Lord Voldemort during the First Wizarding War.

Sirius is introduced prominently in Harry Potter and the Prisoner of Azkaban. The public story initially portrays him as a dangerous escaped prisoner, but the novel later reveals important facts about the betrayal of the Potters and Sirius’s relationship with Peter Pettigrew. This reversal is central to the book’s mystery.

Sirius belongs to the ancient Black family and can transform into a large black dog because he is an Animagus. His name references the star Sirius, traditionally called the Dog Star, which fits that animal form. He remains an important emotional figure for Harry even though their time together is limited.