According to ComicBook.com on Oct. 5, Bradley Cooper has just started work on James Gunn's "Guardians of the Galaxy". In August, it was officially announced he would be in the movie portraying the furry character Rocket Raccoon as a voice over role. Currently it is unclear on when he'll start doing the voice over for the character, but as of now, there had been no sightings of Cooper on the set.
Gunn was asked earlier yesterday about whether or not Cooper has started work and Gunn's response was simply, "Yes he has. He’s awesome".
Gunn had been filming the project the past couple of months in England and the sight of Cooper's voice over project is not known. Vin Diesel is also another actor reportedly doing the voice over work for the CGI character Groot and is currently working on "Fast and the Furious 7"
Today the performances of @prattprattpratt @zoesaldana @DaveBautista & @Thejudgegunn made me tear up. From my heart, they are all amazing. Today @Michael_Rooker swallowed this scene like a boa would a baby rabbit. I can’t wait for you guys to meet Yondu. Wow".
Cooper will also be in the upcoming retro film "American Hustle" and will be making his voice known in "Guardians of the Galaxy" come Aug. 1, 2014.