Hersheypark regularly makes announcements about additions or new features to their park, but today's promises to be their "biggest announcement ever."

The Hersheypark Facebook page shared a post titled "Biggest Announcement Ever" with a video that included photos of the park since its early days, over 100 years ago. The video ends with a tease of said big announcement, which will be coming on Oct. 3.

Take a look below:

Biggest Announcement Ever For more than 110 years, our story has been filled with timeless family rides, thrilling coasters, your favorite Hershey’s Characters, and #HersheyparkHappy memories. On October 3, the story continues with our biggest announcement ever. Posted by Hersheypark on Wednesday, September 12, 2018

So, what is this big announcement? Details are sparse at this point. But as we have reported earlier this year, we know that Hersheypark is planning for a big expansion coming in 2020.

If we're going by the literal definition of "big," referring to the size of the park itself, it seems pretty likely that this upcoming announcement will be connected to that expansion.

Hersheypark has also already revealed their "top secret" ride plans for 2019, the Reese's Cupfusion, which will be replacing the Reese's Xtreme Cup Challenge. Their latest new rides, Whitecap Racer and Breakers Edge, opened in May of this year. Both were water rides, with Breakers Edge being the park's first water coaster.