That captionless picture of Groot that Vin Diesel put on his Facebook page in August reemerged Sunday and, while it still didn’t have a caption, it was followed by confirmation that the actor will in fact voice “the highly intelligent, sentient treelike alien†in the upcoming Guardians of the Galaxy. Marvel announced Diesel’s involvement with the movie hours after he’d posted the photo via a post on their own website. The Hollywood Reporter points out that even director James Gunn got in on the fun, replying to one fan’s casting query with: “…I’d hate to think I spent all this time recording him for no reason.†Now that that’s settled, let’s imagine what type of car this creature will be racing.