Vin Diesel : Voicing Groot is extremely testing

Activity star Vin Diesel says voicing Groot in 'Watchmen of the Galaxy' is extremely testing as the constrained vocabulary makes it difficult to get feeling over. The 49-year-old performer's character in the Marvel Comics motion picture establishment is a tree-like humanoid named Groot who can just say "I am Groot".

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"It's, extremely testing since you're restricted to three words. There's a mystery script that I get where it has the greater part of Groot's lines, however the catch of everything is the main way I can state it is: 'I am Groot'," Diesel said.