During last night’s episode of Hogwarts Tournament of Champions a first look teaser for Harry Potter 20th Anniversary: Return to Hogwarts aired. It featured Helena Bonham Carter peeking over a special edition of the Daily Prophet, cast members Robbie Coltrane, Matthew Lewis and Mark Williams receiving what appear to be Hogwarts letters, and maybe a tease of Emma Watson walking to the train. Whatever could that mean?!

The special hits HBO Max on January 1st.

Daniel Radcliffe, Rupert Grint and Emma Watson join other esteemed cast members across all eight Harry Potter films as they travel back to Hogwarts for the first time to celebrate the anniversary of the franchise’s first film, Harry Potter and the Sorcerer’s Stone, which premiered 20 years ago this year. The retrospective special Harry Potter 20th Anniversary: Return to Hogwarts will tell an enchanting making-of story through all-new in-depth interviews and cast conversations, inviting fans on a magical first-person journey through one of the most beloved film franchises of all time. The highly-anticipated retrospective will be a capstone event of the holiday season, dropping as the clock strikes midnight on New Year’s Day, Jan. 1, on HBO Max.