Filmmaker James Gunn has praised star Vin Diesel for being a 'perfectionist' in his upcoming film 'Guardians of the Galaxy'.
Diesel plays Groot, a tree alien who is only able to introduce himself, but Gunn said that the 'Fast and Furious' star worked hard at delivering his only line, Metro.co.uk reported.
He revealed on the Pointless Podcast that all of the 'I am Groots' that were earlier voices didn't sound very good, but Diesel was the perfect fit for the character.
