If you’re a Harry Potter fan, you won’t want to miss the 20th anniversary special of Return to Hogwarts on HBO Max. It happens on New Year’s day and features a celebration of the famed film franchise and the reunion of cast members Daniel Radcliffe, Rupert Grint and Emma Watson. More cast members will be there with filmmakers across all 8 Harry Potter films for the first time, and to celebrate the 20th anniversary of the release of the franchise’s first film Harry Potter and the Scorcerer’s Stone.