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'X-Files' stars, creator tweet clues from set

The truth is out there...on Twitter. Stars Gillian Anderson and David Duchovny post photos from "The X-Files" set, while show creator Chris Carter gives fans their first hint at UFOs.

Welcome back to the set, Agent Mulder. David Duchovny/Twitter

The Lone Gunmen would be proud.

Actors Gillian Anderson and David Duchovny -- FBI Special Agents Dana Scully and Fox Mulder, respectively -- have been using their social media accounts to give fans sneak peeks at personal moments in their long-anticipated return to "The X-Files."

Fans have been eager for "X-Files" updates ever since it was announced the hit sci-fi series would return to Fox with a six-episode mini-series premiering in January 2016.

Anderson tweeted, "And so it begins" with an image of Mulder and Scully's chairs on the set, where filming started Monday.

If that wasn't enough to get fans shouting "I want to believe," Anderson also tweeted alien and lipstick kiss emojicons along with a selfie of herself back to Scully's red hair.

Duchovny also tweeted from the plane on the way to "The X-Files" set, "Hello Vancouver ? Mulder? Here I come..."

Once he arrived he tweeted a photo of "The X-Files" welcome binder...complete with a UFO graphic. And today Duchovny teased fans with a very dark image of his script placed on his chair.

Scully's hair is back in the red! Gillian Anderson/Twitter

But it was "X-Files" creator Chris Carter who let a doozy of a spoiler out on Instagram with an image of a clapperboard that read, "UFO TEST."

In addition to Anderson and Duchovny reprising their roles, other main cast members from the original "X-Files" series are returning including William B. Davis as the Smoking Man, Mitch Pileggi as Mulder and Scully's direct supervisor Walter Skinner, and Annabeth Gish as Special Agent Monica Reyes.

"Community" actor Joel McHale will play Tad O'Malley, "the anchor of a popular conservative Internet news network who becomes an unlikely ally for Fox Mulder," according to Deadline.

Be sure to follow the official "The X-Files" Fox Instagram account for the latest updates from the set.

"The X-Files" premieres January 24 on Fox.

We want to believe in UFO tests! Chris Carter/Instagram