Is Vin Diesel voicing Groot in Guardians of the Galaxy? It has yet to be officially confirmed, but pretty much all signs are pointing to yes. Hero Complex had an opportunity to chat with the actor and jumped right into it. When they asked, "Ok, so why Groot?" Vin responded with the following.
I’m an actor. I can do whatever the … I want. As an actor, not everything has to be the most obvious choice. And sometimes, the best thing you can do — as far as Steven Spielberg and his advice — is to defy expectations. So if everybody thinks you’re going to go for this one thing and you flip it entirely and go for the strangest Marvel character, it’s interesting. And when something is interesting, it’s inspiring.
When HC stated Guardians is at least halfway through production, Vin said, "That’s the thing — I’m so busy. The audience wanted Vin and Marvel, Vin and Marvel. But I’m too busy to do a six-month role. So what Marvel came up with was really interesting. … I am watching a social wave influence and in some ways guide their thinking.."
As for why he changed his Facebook cover photo, The Fast & Furious actor says he gets "inspired by things" and that Marvel isn't upset with him at all over the move. "The last thing they are is mad. I'm pretty open, but I have been secretive about this. I went to Comic-Con and I got blasted while I was on the Hall H panel for Riddick. Someone asked a Marvel question. I couldn't say anything because of that secrecy."
So yeah, it seems safe to assume we'll hear Vin's signature voice say "I AM GROOT!" quite a few ways when Guardians of the Galaxy hits theaters 8/1/14.
Source: Hero Complex