Enzo Cilenti to Play Groot in 'Guardians' Movie?

Update 2: As of 8/11/13, Vin Diesel has been strongly rumored to be playing Groot.
 
Update: The tweet has now been removed by Mr. Cilenti. Possibly because Marvel told him to.

Actor Enzo Cilenti, of The Rum Diary and Kick-Ass 2, has recently posted this mysterious tweet to his twitter...

I may or may not be in #Guardiansofthegalaxy. I am sworn to secrecy so can't say. In entirely unrelated news, "I am".
— Enzo Cilenti (@EnzoCilenti) May 8, 2013

While the tweet could possibly be about any role in the 2014 Marvel Studios film, the way he put the words "I am" in parentheses is very suspect indeed. For those of you know don't know, the character of Groot, a tall tree-like creature, has one phrase that he repeats over and over again..."I am Groot." Could Mr. Cilenti have been hinting at being cast as our favorite sentient-tree? Only time will tell. Hold tight for an official announcement.