We've seen the Guardians . We've heard a sample of Bradley Cooper's Rocket Raccoon. The biggest question mark for left most fans is probably Vin Diesel's take on the arboreal alien, Groot.

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On the most recent episode of Kevin Pereira's Pointless Podcast, Guardians of the Galaxy director James Gunn talks about what to expect from the Fast & Furious star's interpretation of the character."The ways in which Vin Diesel says 'I am Groot,' I am astounded," Gunn says. He explains that while others attempted to recite Groot's simplistic vocabulary comprised only of the phrase "I am Groot," nobody came close to Diesel."All of the 'I am Groots' that were earlier voices didn't sound very good at all, they sounded like sh*t. It just didn't really work. Then Vin came in and in one day, laid down all these 'I am Groot' tracks, and he's a perfectionist. He made me explain to him with ever [sic] 'I am Groot,' exactly what he was saying.....Then Vin would sit there and he would do it and he would it again and again and again, and his voice is so rich and so beautiful and he really opened up and was this character. It was amazing when we first put that voice in there how much the character changed and how much he influenced the character."Those who follow Diesel on social media may remember footage and photos of the actor walking on stilts. "We're doing some mo-cap," Gunn confirms. "What we're doing basically with Bradley, and my brother Shaun, and with Vin Diesel, we film everything that they do so we can use it as a reference. So while they're recording in front of a microphone we'll have Vin acting out everything and doing all the acting and we'll record that."Though Vin Diesel is famous for his action roles, Guardians of the Galaxy won't be his first stab at voice acting. He provided the voice of the titular giant robot in the 1999 animated film The Iron Giant, as well as the voice of Riddick in the Chronicles of Riddick video games and Dark Fury animated movie.Guardians of the Galaxy hits theaters August 1.Via Coming Soon

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