Harry Potter fans have a big reason to celebrate.

“Harry Potter and the Sorcerer’s Stone” first premiered on November 14, 2001.

That makes the film over 20 years old.

The main cast and HP alum are finally coming together for a reunion special.

“Harry Potter 20th Anniversary: Return to Hogwarts” will premiere on New Year’s Day.

The special is described as an “enchanting making-of story through all-new, in-depth interviews, and cast conversations.”

In addition to the main cast, director Chris Columbus will also talk about his experience making the first film in the franchise.

Many fans took to Twitter in order to express their excitement.

For fans 20 and younger, they have never lived in a world without Harry Potter.