The worst-kept secret of the superhero film universe is now official: Marvel has finally confirmed that Vin Diesel is voicing Groot, the extraterrestrial plant monster of comics lore, in James Gunn‘s Guardians of the Galaxy. The Fast & Furious star has been teasing the role for months and posted a photo over the weekend posing with his onscreen alter ego. Gunn added via Facebook: “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!)” Diesel stars in the cosmic superteam actioner alongside Chris Pratt as Star-Lord, Bradley Cooper as Rocket Raccoon, Zoe Saldana as Gamora, Dave Bautista as Drax. The Marvel pic hits theaters August 1, 2014. See any resemblance below?

Guardians of the Galaxy Vin Diesel Groot

Related: Vin Diesel In Talks To Join ‘Guardians Of The Galaxy’

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