Panic! At The Disco are teasing something. And it seems to involve Will (actor Noah Schnapp) from the popular Netflix series Stranger Things.

Check out the details, teasers and tweets from the fan frenzy below.

Read more: Panic! At The Disco originally intended to be a hardcore band

Yesterday, Panic! At The Disco simply tweeted “IX XXII – join us” and links to a sign-up page. No one's sure what they're signing up for, but there's a good chance it'll get announced tomorrow since Sept. 22 in Roman numerals is IX XXII.

Now, what about Will from Stranger Things? Well, the actor subtweeted Panic! At The Disco's mysterious tweet with the same caption, also tagging frontman Brendon Urie's Twitter. Panic! At The Disco retweeted Schnapp's subtweet. There's our connection.

Most recently, Panic! At The Disco posted a teaser video with the caption “I spy, with my lttle eye !”

Read more: Brendon Urie surprised onstage by ex-Panic! At The Disco drummer Spencer Smith—watch

Here's Panic! At The Disco's new profile picture on socials to accompany the campaign.

Unsurprisingly, fans are in a frenzy.

I mean, probably. But Panic! At The Disco and Stranger Things? Who cares!

Watch more: APMAs 2016: PANIC! AT THE DISCO win Song Of The Year for “Hallelujah”