Months after our first report that Vin Diesel will provide the voice of Groot in Guardians of the Galaxy, Marvel Studios has finally confirmed that the actor has signed on to star in the Marvel Phase Two ensemble. Take a look at the photo that the actor posted on his official Facebook page, along with Marvel's press release.

Vina Diesel as Groot in <strong><em>Guardians of the Galaxy</em></strong>
"Vin Diesel is Groot!

The star of the Fast & Furious and Riddick franchises will lend his voice to Groot in Marvel's live-action Guardians of the Galaxy, rounding out the team that includes Star-Lord (Chris Pratt), Rocket Raccoon (Bradley Cooper), Gamora (Zoe Saldana) and Drax (Dave Bautista).

Featured in four of the six movies in the fan-favorite Fast & Furious franchise, Diesel has helped the series gross over $2 billion at the box office; and will reprise his role in Fast & Furious 7. Diesel's most recent film, Riddick, the third film in the franchise that has so far earned a cumulative $267.3 million across the globe, debuted this year at the top of the box office. In addition to lending his voice to several video games, Diesel received great acclaim for his voice work in the celebrated animated film The Iron Giant, directed by Brad Bird.

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In the far reaches of the Marvel Cinematic Universe, an unlikely cast of characters including Peter Quill, Gamora, Drax, Groot and Rocket Raccoon must join forces to defeat a cosmic force of epic proportions. Directed by James Gunn, the live-action Guardians of the Galaxy will take fans to new corners of the Marvel Universe when it hits theaters August 1, 2014, but in the meantime stay tuned to for the latest news as it breaks, including official casting, first looks and more!

In addition to Guardians of the Galaxy, Marvel Studios will release a slate of films based on the Marvel characters including Captain America: The Winter Soldier on April 4, 2014; Avengers: Age of Ultron on May 1, 2015; and Ant-Man on July 31, 2015."

Director James Gunn also released a statement on his|Facebook page.

"Yep it is completely official. AND he's amazing. I never knew someone could say I AM GROOT so many different ways and with such feeling (and that sounds like I'm kidding but I'm not!)"