I'm currently watching Guardians of the Galaxy on Netflix and as we know, Vin Diesel played Groot.

The question. What's the point?

I mean. Groot has a distorted voice, only says "I'm Groot" and doesn't look like Vin Diesel, if human anyways, at all.

Vin Diesel is an A-list actor, costs a fortune and I couldn't even tell if my neighbor would have played Groot.

  • 10
    – BCdotWEB
    Commented Oct 30, 2016 at 9:38
  • 6
    Please refrain from commenting just "thank you" on answers. Thank them by upvoting. If you have something else to say it, great, do so but just saying thanks is clutter and will likely be deleted.
    – Catija
    Commented Oct 30, 2016 at 22:55
  • 4
    I disagree with your premise, therefore, Why not?
    – Möoz
    Commented Oct 30, 2016 at 23:49
  • 3
    From the opposite end - why would a top actor want to do something different? Variety? To avoid being typecast in a specific role? To do something fun that doesn't express the same requirements as physical acting? Acting that is more cerebral? Availability-voice acting takes a lot less time, and could fit in before his next scheduled role? Vin Diesel probably has enough money to indulge himself.
    – Criggie
    Commented Oct 31, 2016 at 0:08
  • 4
    As my comment was supposed to indicate, it's not about how much I like him or don't. But he is a niche actor, he's not got the breadth of roles I would expect an A lister to have. With the exception of Riddick, it's hard to credit him with all of the draw on the box. He doesn't have the kind of draw or range that someone like DiCaprio or Will Smith have, that's all I was trying to say. If you google "a list actor list" there's even a scroll bar of them, that doesn't include him.
    – Paul
    Commented Oct 31, 2016 at 21:26

7 Answers 7


A-list actors are supposed to be "bankable stars", so it makes sense that directors/producers would want one in their movie.

But Vin Diesel wasn't the first to audition for the role, as revealed by James Gunn:

All of the 'I am Groots' that were earlier voices didn't sound very good at all, they sounded like shit. It just didn't really work.

Then Vin came in and in one day, laid down all these 'I am Groot' tracks, and he's a perfectionist. He made me explain to him with every 'I am Groot,' exactly what he was saying

Then Vin would sit there and he would do it and he would it again and again and again, and his voice is so rich and so beautiful and he really opened up and was this character. It was amazing when we first put that voice in there how much the character changed and how much he influenced the character.

And Vin Diesel had this to say:

I was lucky that I had a director [James Gunn] who was willing to indulge me. I told him:

We know that Groot is really saying any number of things when he says that line and most people are oblivious to the nuances of his speech because of his hardened larynx’.

All you hear is the growl but he could be saying any number of things and we know that Rocket Raccoon understands him. He doesn’t always tell everybody he understands Groot and he plays on that, but he does understand him.

So I asked James:

‘Can you give me a basic idea of what he’s trying to say when he’s saying “I am Groot”?’

James had a 50-page document waiting for me when I came in to do the voice. On the left-hand side of the page it said ‘I am Groot’ and on the right-hand side it had whatever the line really was if you could understand this floral colossus. That was the beginning of trying to go deep into a character like this.

In many ways it was the most challenging thing to ask an actor to do. The thespian in me responded to the challenge of not being able to use facial expressions, physicality or a Golum-like vocabulary.

  • 17
    Also, he wore stilts
    – Yakk
    Commented Oct 30, 2016 at 22:02
  • 2
    +1 although I definitely can't tell it's Diesel, and don't believe for a second anyone who says they can, he did a really good job.
    – DCShannon
    Commented Nov 18, 2016 at 23:49
  • He also got paid $54,000,000 for his performance. Commented Nov 15, 2022 at 19:00

Remember that Vin Diesel was the voice actor for the Iron Giant in The Iron Giant (1999), and it was a great role which his unique voice suited, so we know that Vin Diesel is not just an A List actor that happens to be voice acting for Groot, but that he is actually a good voice actor with the resume to back it up.

As for hiring any A lister actor to voice act in your movie, any opportunity for a studio to put a famous actor's name on a poster (ensuring more ticket sales) is one they will always take. Starpower translates directly to more successful box office sales, and Vin Diesel, especially around the time of Guardians of the Galaxy releasing, was immensely popular.

Side-note: he is also a prolific voice actor for video games, including the Chronicles of Riddick franchise games based on his character Richard B. Riddick from the film Pitch Black (2000), and a Grand Theft Auto style game called Wheelman. He seems to love video games, tabletop games and other aspects of geek culture, which makes him an adequate fit for an obscure comic book movie.

  • 27
    Riddicks first name is Richard? I'd never heard of that before. "Riddick" is the name of a kick-ass anti-hero, whereas "Richard B. Riddick" sounds like an accountant, and not a very good one at that.
    – user11607
    Commented Oct 30, 2016 at 22:42
  • 1
    @LegoStormtroopr In this video clip you can see the moment in the movie where he introduces himself, though he is introduced as Richard B. Riddick even earlier in the Pitch Black prequel Shockwave animated comic, Pitch Black: Slam City, released 1 month prior to the release of the movie. He is literally introduced as "Richard B. Riddick" in the first second of the animation. Commented Oct 31, 2016 at 8:24
  • What's also interesting, and perhaps odd, is that in Jim and Ken Wheat's original script for Pitch Black, the Riddick character was a woman named Taras Krieg. Commented Oct 31, 2016 at 8:26
  • 1
    Also, FWIW it's also worth noticing that Vin Diesel also was basically responsible for Riddick actually happening Commented Nov 1, 2016 at 19:39
  • 1
    So to his friends he's Dick Riddick. Commented Aug 17, 2017 at 7:22

I think Vin Diesel was a good choice.

Let’s not forget that much of what an actor does comes in the form of how he says his lines. Most of communication occurs outside of just words. Much of that is in motions and gestures, but much of it is also in intonation, timing, stress, volume, etc. Plus, Vin Diesel has a unique sounding voice that fits the role of a large, powerful tree being.

Some reinforcing points for thought are these. One of the shortcomings of email is you simply receive the words someone says, and lose much of the full meaning coming from the sender. Another example close to home for me is when you talk to your pet. They don’t understand language for the most part, but they understand a lot based on how you speak it.

As far as an A-list actor goes, the handicap of only speaking several actual words means that your full acting talent has to come to bear in order to pull it off. Maybe an A-lister is what is needed here. By the way, Groot also says “We are Groot”.

  • 1
    thank you for your thoughts. the comparing to the animals and humans is pretty interesting and a valid thought. and yes. i remember that he does changed the sentence at the end. but i'm currently in the middle of the movie :)
    – David Seek
    Commented Oct 30, 2016 at 7:01
  • 8
    This pretty much nails it: "the handicap of only speaking several actual words means that your full acting talent has to come to bear in order to pull it off". Conveying the right, but varying, things with the same text is hard.
    – Mast
    Commented Oct 30, 2016 at 9:25

Vin Diesel has experience as a low-vocabulary voice actor.

Vin Diesel plays D&D.

Vin Diesel talks about his being Groot in this video, says something about how Groot needs a "formidable voice." I can think of few more formidable.

  • 6
    Also, getting even an A-lister to go into a sound booth and say "I'm Groot" repeatedly is relatively inexpensive and adds a recognizable name to the cast which will draw a larger audience. Commented Oct 30, 2016 at 12:34
  • @JohnSensebe "relatively inexpensive"According to many reports, Diesel earned approximately $25 million for his acting work on Guardians and Furious 7 Commented Oct 31, 2016 at 12:36
  • 4
    Also, don't forget that he voiced for Groot in many different languages, as many as 15 languages. I doubt that the cost of that was "inexpensive", even if we're speaking relatively. Commented Oct 31, 2016 at 12:39

In addition to the excellent answer by Oliver_C:

In theater, there is a very famous scene in the play "Cyrano De Bergerac" in which the titular character repeats a single word over and over (twenty times or so?). It's considered a real challenge for an actor to perform this scene well -- because you have to find some way of making each repetition something different that adds to the scene.

There's a similar scene in a more recent play called "Peter and the Starcatcher" in which a character repeats the phrase "ohmigod" dozens of times, rapid fire. Done well it's hysterically funny. Done poorly, the joke would have fallen completely flat.

Or another play, "The Foreigner", in which one character tells a story in a gibberish made-up language. The ENTIRE scene only makes any sense (and again, can be quite funny) if there person playing the role does it well. With a lesser actor you're basically just watching someone go "blah blah blah" for five minutes and it would be terribly unfunny.

Having the single line "I am Groot" was NOT a simple thing to do well. I actually give Vin Diesel a lot of credit for the performance he gave. He managed to make a character with one line (okay... two lines) compelling and entertaining. He earned his paycheck.


For big budget films and from a business perspective big name stars are a good way to help ensure a good return on investment.

Also consider that Vin Diesel has a fairly well defined persona which audiences are familiar with and for a character like Groot especially this can be an effective and efficient way to give a character a bit more depth and relatability.

Similarly it is not trivial to create a convincing CGI charter or puppet from scratch and having a real actor to work with who is capable of capturing the personality of that character can help a lot. Consider also the physical acting work that Andy Serkis did for Gollum which undoubtedly helped to sell the character on screen in a way that a random person acting as a motion capture placeholder probably would not have managed in part through interaction with actors, animators etc that you never see on screen.


As far as I understand it - Diesel was in talks to star in Inhumans; but when Marvel saw the fan reaction to him joining the MCU, they didn't want to wait that long; and started looking for a role he could do sooner:

Sources: http://screenrant.com/vin-diesel-marvel-movies/

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .