Christmas has come early ... sort of! 'Glee' has released its cover of 'Let It Snow.'

The song, a duet between Kurt (Chris Colfer) and Blaine (Darren Criss), is featured on the upcoming Christmas album due out Nov. 15. The updated cover of the Sammy Cahn and Jule Styne classic is high-energy and should be a delight to any Klaine fan out there.

In addition to classic songs, 'Glee: The Music, The Christmas Album Volume 2' will have two original numbers.

Check out 'Let It Snow' after the jump!

You'll be seeing a lot more Darren Criss on 'Glee' this fall now that the actor has been made a series regular, and his first official duty as a full-time cast member is to hit up the crowded California chaos center known as San Diego Comic-Con.

The Warblers leader will head up the 'Glee' panel alongside fellow full-time newbie Harry Shum Jr. (also known as Mike Chang), Jenna Ushkowitz (Tina) and Dot Marie Jones (Coach Bieste). While Ryan Murphy will be M.I.A., TVLine reports that co-creators Brad Falchuk and Ian Brennan, executive producer Dante di Loreto and choreographer Zack Woodlee will be in attendance.

The panel, which will be held in Hall H on Sun., July 24 at 10AM, will be moderated by TVLine's Michael Ausiello and will also give fans a sneak peek at the 'Glee' 3-D concert movie.

Darren Criss and his Warblers better watch their backs! With 'Glee' on hiatus for the summer this little boy is filling the void with his spot-on impressions of the Dalton Academy singing group that captured hearts this season. The tiny Warbler has it all down -- the singing, the moves and and even the costume! He's just a little too young to be anyone's Teenage Dream yet.

The 'Glee' cast, complete with members of the Warblers, is on tour this summer performing hits from the series. Check out the mini Warbler's moves and tell us what you think!