Celebrity·Posted on Jul 25, 2014Vin Diesel Wore Stilts And An "I Am Groot" Shirt At The "Guardians Of The Galaxy" London PremiereHe IS Groot, though.by Whitney JeffersonBuzzFeed StaffLinkFacebookPinterestTwitterMail "I am Groot." "I am Groot." "I am Groot." "I am Groot." "I am Groot." "I am Groot." Here's a close-up of the high-tech stilts: "I am Groot."