Harry Potter stars are traveling to Platform 9-3/4 in HBO Max’s teaser trailer for Harry Potter 20th Anniversary: Return to Hogwarts.

The whimsical trailer shows Robbie Coltrane (Hagrid) and Matthew Lewis (Neville) receiving their invitations to Hogwarts and Mark Williams (Mr. Weasley) on the train to the school. The identities of two cast members are kept hidden in the trailer – one behind a copy of The Daily Prophet and the other is seen walking to the platform.

Return to Hogwarts will bring together Harry Potter stars Daniel Radcliffe, Emma Watson, and Rupert Grint for a trip back to the magical school. The reunion will also host Helena Bonham Carter, Ralph Fiennes, Jason Isaacs, Gary Oldman, Tom Felton, James and Oliver Phelps, Bonnie Wright, Alfred Enoch, and Evanna Lynch, as well as Coltrane, Williams, and Lewis.

The special will feature cast conversations and interviews, along with new details on the film production. It’s set to air on HBO Max on January 1, 2022.