• Kumail Nanjiani, best known for his comedic roles in "The Big Sick" and "Silicon Valley," will star in Marvel's "The Eternals," which will be released in November 2020.
• To prepare for his debut in the traditionally action-heavy Marvel Cinematic Universe, Nanjiani has been training for a year to transform into a comic-book hero.
• He shared the results on Instagram on Monday while acknowledging it would have been impossible if he "didn't have a full year with the best trainers and nutritionists paid for by the biggest studio in the world."
• Plenty of celebrities flooded Nanjiani's comments, sharing their shock at the transformation.
• Visit Insider's homepage for more stories.

On Monday, Kumail Nanjiani revealed the incredible results of his yearlong journey to get ready for his Marvel debut by posting what he called "thirsty shirtless" photos.

Primarily known as a comedic actor, Nanjiani will play Kingo, a samurai with cosmic powers, in "The Eternals," which will tell the story of Marvel's next big superhero team when it's released in November 2020.

Fans have been noticing Nanjiani's changing physique for a few months now. When he posted in August from Disney's D23 convention, many comments noted how "swole" his arms looked. Another post from April showcased his biceps.

But on Monday, the 41-year-old revealed his full transformation, posting two shirtless photos and quoting "The Dark Knight": "You either die a hero, or you live long enough to see yourself become the villain."

Nanjiani said he worked out with trainers nearly every day while shooting the movie. He made it clear he "would not have been able to do this if I didn't have a full year with the best trainers and nutritionists paid for by the biggest studio in the world."

"I'm glad I look like this, but I also understand why I never did before. It would have been impossible without these resources and time," he continued.

The comments came flooding in. Tan France wrote, "ARE YOU F---ING KIDDING ME? I AM LIVID," while Chelsea Handler jokingly complained, "This is ridiculous. This means anyone can get fit."

If you're worried we're all lusting over a married man, don't worry: Nanjiani's wife of 12 years, Emily Gordon, encouraged fans to "get yourself an eyeful."

• Read more:
• Marvel's next big superhero group movie is called 'The Eternals.' Here's the cast and who they're playing.
• Marvel just announced all its movies for the next 3 years — here they all are
• Sacha Baron Cohen showed off a body transformation in a workout video posted by his wife
• 'Mission: Impossible' star Simon Pegg underwent a radical body transformation for his latest role

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