Vin Diesel On Voicing Baby Groot In Guardians Of The Galaxy 2

04/09/2017 06:56 pm EDT

Fast & Furious star Vin Diesel certainly deserves a lot of credit for making a seven-foot, humanoid tree creature who can only communicate with very limited vocabulary most people's favorite character in 2014's Guardians of the Galaxy.

"It's very, very challenging because you're limited to three words," Diesel told Total Film. "There's a secret script that I get where it has all of Groot's lines, but the catch of it all is the only was I can say it is: 'I am Groot.'"

For a fully-grown Groot, Diesel perfectly balanced gruffness and sweetness in his delivery. However, after Groot's tearjerking sacrifice ("We are Groot.") at the end of the film and getting resurrected when Rocket repotted one of his twigs, we're getting a much younger, pint-sized version of him.

So how will Diesel, who has a naturally gravelly pitch, be able to voice Baby Groot? "I change it super, super, super, super high," he smiled. "I have a feeling they'll do a combination of things [to alter the sound electronically]. I mean, I do it super high-pitched. [Adopts glass-shattering Baby Groot squeal] 'I am Groot!'"

MORE: Marvel's Guardians Of The Galaxy Vol. 2 Gets A Weird Trailer / Guardians Of The Galaxy Vol. 2 Director Reveals Soundtrack Release Date / Guardians of the Galaxy Vol. 2: Zoe Saldana On Gamora's Relationship With Nebula

Set to the backdrop of 'Awesome Mixtape #2,' Marvel's Guardians of the Galaxy Vol. 2 continues the team's adventures as they traverse the outer reaches of the cosmos. The Guardians must fight to keep their newfound family together as they unravel the mysteries of Peter Quill's true parentage. Old foes become new allies and fan-favorite characters from the classic comics will come to our heroes' aid as the Marvel cinematic universe continues to expand.

Guardians of the Galaxy Vol. 2 is written and directed by James Gunn (Slither). The film marks the return of the original Guardians, including Chris Pratt (Jurassic World) as Peter Quill/Star-Lord; Zoe Saldana (Star Trek Into Darkness) as Gamora; Dave Bautista (Spectre) as Drax; Vin Diesel (Furious 7) as the voice of Groot; Bradley Cooper (American Sniper) as the voice of Rocket; Michael Rooker (Jumper) as Yondu; Karen Gillan (The Big Short) as Nebula; and Sean Gunn (Gilmore Girls) as Kraglin. New cast members include Pom Klementieff (Oldboy), Elizabeth Debicki (The Great Gatsby, Everest), Chris Sullivan (The Knick, The Drop) and Kurt Russell (The Hateful Eight, The Thing).

Guardians of the Galaxy Vol. 2 is scheduled to hit theaters on May 5, 2017.

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