Glee fans, this is not a drill!

It had been rumoured that quite a few of the original cast members would be reuniting for Glee's final season. Apparently the show's creator Ryan Murphy extended invites to every past cast member to return for one last hurrah, but until now we weren't 100% sure who was going to take him up on the offer.

Well, it looks like filming for this season is well underway, and there have been some very exciting pictures on social media today and yesterday!

Aside from the current cast members – Lea Michele, Chris Colfer, Naya Rivera, Kevin McHale and co… there have been a few new additions!

Kevin posted this picture today of himself, Chris and Jenna Ushkowitz (Tina), which really got our pulse rates going… 

The sweet caption read, "The 3 of us met each other for the 1st time and got hired for Glee 6 years ago today. Happy 6th Glee anniversary @jennaushkowitz & @hrhchriscolfer love u both…a lot." Aaaaw!

Last night Lea also posted a sneaky snap, this one of none other than Brittany S. Pierce!

Although Dianna Agron has been very hush-hush, she posted a picture of herself yesterday in her trailer looking very Quinn-esque altogether:

And to round things off nicely, this evening Lea shared a pic of herself, Chord Overstreet (Sam) and Mark Salling (Puck) in 80s gear on set: 

Hold us. We can't cope. What will the first song of the season be? This is too much excitement!