Later this year a brand new entry in the long-running horror franchise Halloween will be arriving in theaters. But just before that, a massive event is being held called H40: 40 Years of Terror to celebrate the 40th anniversary of John Carpenter‘s classic original and the franchise as a whole.

The event, which is being held at the Pasadena Convention Center in October, promises to be the biggest Halloween convention ever with cast and crew from every movie in attendance and more for fans to enjoy.

You can read the full announcement with all of the details below.