Everything I’ve seen and learned about director James Gunn’s Guardians of the Galaxy tells me it’s going to be something special. Not only does the film have an incredible cast (Chris Pratt, Zoe Saldana, David Bautista, Glenn Close, Michael Rooker, Lee Pace and John C. Reilly) and feature plenty of new characters in the Marvel universe, it’s going to be unlike any Marvel film and unlike any other Hollywood sci-fi space adventure.

While we all knew Bradley Cooper was voicing Rocket Raccoon, I’ve been wondering what type of voice and accent he’d use for the role. Earlier today, at the press junket for David O. Russell’s American Hustle, I asked Cooper how he got involved in the project and Rocket’s voice. He revealed he wasn’t familiar with the comic when he was first approached for the role, and about his accent he said, “one thing we debated was…he’s seen as a cockney accent sometimes, so we talked about whether we’d do that or do this sort of other guy from the city a little bit.” He also praised Pratt’s performance calling it “unbelievable” and that it “blew him away.” Hit the jump for more.

Here’s everything Cooper said about Guardians of the Galaxy, which opens August 1, 2014. Look for the full interview soon. For more on Guardians, read what Marvel Studios President Kevin Feige had to say about the pic, including the identity of the film’s main villain, the role of Thanos, and when the film takes place in relation to the other Phase Two movies.

Bradley Cooper: