After unceasing speculation on Vin Diesel's real role in the "Guardians of the Galaxy" movie, Marvel has issued an official press release.

The statement was made to end all doubts, or possibly just to prevent spoilers. There will be more speculation as the bloggers would feel like they actually hit a vein.

Vin Diesel if officially Groot. Whether he has one line, whether they will really use motion capture is uncertain. Also, the underlying question, will the 'Fast and Furious' lead star play another role in the movie.

The full press release from Marvel:

"Vin Diesel is Groot!

The star of the Fast and the 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's received great acclaim for his voice work in the celebrated animated film "The Iron Giant," directed by Brad Bird.

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.

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."

On the subject that there is only one line on the script for the Groot character, director James Gunn has posted on his own 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!)"

There it is. It is official and now we have to wait for the movie, which is already on post production. Until then, rumors will still swirl about Diesel's role in the Marvel Cinematic Universe. If not on this movie, in the next ones.