According to the filmmakers: "Something very special happened at the world premiere of The Game Changers today, and all of us there felt it."
The film looks at plant-based diets and their impact on athletic performance as well as the planet.
Writing about the film on social media, one viewer said: "Saw Game Changers today. Very moving and great affirmation why I went vegan. You changed my husband today!"
Another wrote: "There was an excitement, an electricity of change and growth like I’ve never felt before. Wow!"
One more simply added: "What a night! So Excited for others to see the film."
James Cameron teamed up with The Cove’s Louis Psihoyos to make the movie.
Cameron executive produced, while Psihoyos directed.
Psihoyos told Boulder Magazine: "The world’s strongest guy is a vegan.
"The world’s fastest guy, Carl Lewis, was the first to break 10 seconds, and he did it when he was a vegan.
"We’re trying to dispel the myth that you need protein from animals to become a 'real man'."
The general release date is not yet known.