Harry Potter cast reunites for the 20th anniversary on HBO Max

Daniel Radcliffe, Emma Watson, and Rupert Grint, as well as other cast members from the blockbuster film franchise, will reunite for a special 20th anniversary TV retrospective, according to Warner Bros. However, J K Rowling, the author of the "Harry Potter" series, will not be one of the guests on the show.

Robbie Coltrane, who played Hagrid, Tom Felton (Draco Malfoy), Helena Bonham Carter (Bellatrix Lestrange), Gary Oldman (Sirius Black), director Chris Columbus, and other stars from the eight films will join the former child actors for 'Harry Potter 20th Anniversary: Return to Hogwarts' on the film set in London, where the first film was made.

The HBO Max streaming platform will air the show on January 1st. AT&T Inc. owns Warner Bros. and HBO.

The cast will return to the original Hogwarts boarding school sets from the first film, 'Harry Potter and the Sorcerer's Stone,' which was released in November 2001 ('Philosopher's Stone' in the UK).

The movie franchise based on J.K. Rowling's stories about an orphaned boy with magical abilities grossed $7.8 billion worldwide.

According to a person familiar with the situation, Rowling's name was not included in the announcement on Tuesday, but she will appear in archive video that will be broadcast in the programme.

Rowling's views on transgender issues have sparked debate in the last year, with some in the LGBTQ community accusing her of being transphobic.

The TV special is one of numerous 20th anniversary events planned by Warner Bros., which also includes a TV quiz show hosted by Helen Mirren for Potter fans, which will feature cameo appearances by some of the actors and famous fans such as comedians Pete Davidson and Jay Leno.