I am Groot! This is Groot saying Hello to you. Groot is the quietest character in the Marvel Cinematic Universe. The character is a tree who can speak and is voiced by the one & only, Vin Diesel. Groot is a permanent part of the Guardians of the Galaxy franchise. He only says, “I am Groot” and only Rocket Racoon understands him in the movies. Here are some cute and beautiful wallpaper themed on Groot. I am Groot! this was him telling you to grab them. So hurry up!