It's been previously revealed that Guardians of the Galaxy director James Gunn's brother Sean Gunn did the mocap for Rocket Raccoon, but now we see that Sean stood in for more than just Rocket.
"This photo is from [Empire] magazine which features a great article on how we work together and what Sean contributed to the character of Rocket and to the movie as a whole. It also reveals that, in addition to being the onset Rocket, and using a lot of his body and facial work in the character, he was also the onset Thanos, as well as playing the role of Kraglin, Yondu Udonta's First Mate in the Ravagers, and Quill's lifelong frenemy. Few things in my career give me more creative pleasure than working with my brother."
For the filming of the movie, mocap characters have to be put into scenes with voice actors later. So despite Bradley Cooper's voicing of Rocket, Sean Gunn is the physical representation of Rocket, having likely even done the body language and facial expressions for the character.
"We also had a little person, who we used for reference and lighting in scenes - the very very awesome Arti Shah. But Sean is VERY limber and able to crawl around on all fours at the proper height (Rocket is actually smaller than almost all little people). But what was really important was Sean's acting. He essentially co-created the character of Rocket, and his acting is used throughout the film. It was also of great benefit to the other actors, who had a full scene partner who was as an accomplished actor as all of them. If you read the Sci-Fi article you'll find out from Zoe Saldana how important Sean was to the whole process and her personally. And I know Chris Pratt and Dave Bautista also agree. Bautista and Sean had - and continue to have - a special bond that I think is very reflective of the onscreen bond between Rocket and Drax."
Good for you for using the politically correct term little person. It's about time people showed a bit more respect to the proper terminology. It looks as though Sean gets the most versatile actor award! It's as if he and his brother were trying to see just how many aliens he could play in one movie! It may not be a one-man show, but now things seem pretty close!
[Guardians of the Galaxy](movie:424073) hits theaters in mere weeks on August 1st, 2014.