The One Tree Hill cast reunited for a 'mystery project' and fans are freaking out

Looks like Christmas has come early in Tree Hill.

It has been around six years since One Tree Hill went off the air - and we'll admit, we definitely miss it.

The drama followed the lives (and extensive rivalry) between half-brothers Lucas and Nathan Scott as they vied for a spot on their high school's basketball team.

As the show went on, the focus began to shift to the relationships, drama and the brothers' day-to-day lives - and how they ultimately left their rivalry behind and formed a solid bond.

The rumour mill went into overdrive about a possible One Tree Hill reunion this week after a number of cast members confirmed they were working on a mystery project.

Hilarie Burton, Danneel Ackles, Robert Buckley and Antwon Tanner - aka: Peyton Sawyer, Rachel Gatina, Clay Evans and Antwon 'Skills' Taylor - shared behind-the-scenes photos from the "new project" on social media.

Only...the posts were soon deleted.

Fortunately, not before the eagle-eyed social media users were able to get screenshots.

Many fans began to wonder if the mini-reunion meant we would be seeing our favourite Tree Hill residents again soon.

This makes me so very happy!!!! — Sherie (@MartiniHoudini) June 11, 2018

I can’t wait to see what y’all are doing!!! Christmas came really early this year @HilarieBurton !! 😁😁😁 — Kayla grigsby (@kayla_grigs0606) June 11, 2018

However, it looks like it's genuinely for a new project.

There's no hints that other cast members, like Bethany Joy Lenz, Chad Michael Murray, James Lafferty and Sophia Bush, are involved in the mysterious festive project - although TVGuide report both Sophia and Bethany 'liked' Hillarie's post.

In the wake of the photos, a number of screenshots with conversations between Hilarie Burton and Robert Buckley talking about doing a Christmas movie together have resurfaced.

Okay so all our favorite besties are partnering up for a Christmas movie and I’m 100% living for it. Such great news I’m still recovering 😭 @HilarieBurton @robertbuckley @antwon_tanner pic.twitter.com/915RfkLolq — amanda OTH DAY (@butwhocouldstay) June 11, 2018

OMG OMG OMG OMG OMG!!! I can't wait! I need it now! pic.twitter.com/0JZDM04kHo — Alexandra W 😷 #BidenHarris2020 #SaveSanditon (@AlexandraW1031) June 12, 2018

Basically, we're probably going to have to wait until Christmas 2018 to find out what exactly it is.