Bradley Cooper Voices Rocket Raccoon In Guardians Of The Galaxy Featurette

Ahead of the rapidly-approaching home entertainment release of James Gunn's Guardians of the Galaxy, Marvel Studios and USA Today have joined forces to give fans a peek at the special features from the Blu-ray -- in this case, a look at Bradley Cooper's process in voicing Rocket Raccoon.

"Bradley came in and added to that character and created another aspect to that character," says director James Gunn in the bonus feature embedded below.

"The way it works is we kind of get in the groove and you feel what Rocket is like," Cooper says, "and then it just starts to happen and you zone into this Rocket world."

Guardians of the Galaxy will be available on digital HD and the Disney Movies Anywhere app on November 18, and DVD and Blu-ray December 9.