Guardians of the Galaxy "Guardians of the Galaxy" director James Gunn discusses Baby Groot (left) in a behind-the-scenes featurette for the film's Blu-Ray release. Photo: Marvel Entertainment / YouTube Screen Shot

After becoming one of the highest grossing films of 2014, “Guardians of the Galaxy” is about to become everyone’s favorite Blu-Ray stocking stuffer this holiday season. The James Gunn-directed hit will be packed with special features and behind-the-scenes content when it hits store shelves on Dec. 9.

Among those special features being teased on the web is a brief featurette in which Gunn describes how one of the film’s most beloved characters, Baby Groot, came to be. Apparently, shooting on the film had already wrapped before the design of the little dancing twig was finished. The director had a very specific idea for how the character would appear on screen that, from inception to the finished product, remained largely unchanged.

“By that time, our design team knew exactly the kind of thing I was looking for, and I described it pretty well, and it didn’t go through too much iteration before it got to the Baby Groot that’s on screen,” Gunn says in the video below.

Gunn’s vision was spot on as the post-credit scene in which Baby Groot dances to The Jackson 5’s “I Want You Back” became such a fan favorite that Marvel has licensed an official dancing Baby Groot toy, according to Mashable.

This featurette is one of many teases that Marvel Entertainment released on its YouTube channel prior to the “Guardians” release on Blu-Ray. There is a deleted scene featuring an argument between Gamora (Zoe Saldana) and Nebula (Karen Gillan), an individual look at the voice acting behind Rocket Raccoon (Bradley Cooper), Groot (Vin Diesel) and much more.

The film will be available for digital HD download on Nov. 18, however, if fans want to experience all of the special features, they’ll need to hold out for the Dec. 9 release on Blu-Ray, which promises an exclusive look at "Avengers: Age of Ultron." In the meantime, viewers can get their “Guardians” fix by viewing the Baby Groot featurette below.