Vin Diesel is being anything but secretive about his secret role in the upcoming Marvel project "Guardians of the Galaxy." The Actor all but confirmed his role as the extraterrestrial tree-creature Groot from the film in an interview with the L.A. Times after posting a picture of the character to his Facebook page earlier last week.

"I'm an actor," Diesel said when asked about playing the role of Groot. "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."

The interviewer asked if Marvel was upset that he pretty much let the cat out of the bag on Facebook by posting both news of his meeting with them as well as a picture of Groot.

"I get inspired by things. So if somebody sends me a book of conceptual art that's the best character design work I've ever seen - I'm not kidding, I see that and I want to be a little cryptic and I want to say something positive. Even if it's as cryptic as an old, dated image of a character," Diesel said. "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."

Filming for the movie is about halfway over in London. "Guardians of the Galaxy" will be a mesh of both live action and CGI entertainment as some of the characters are aliens, talking animals and tress in the like. With filming almost over and Diesel's character recently cast, it's likely he'll be doing some voice over work for the role.

"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."