Michael B. Jordan Dishes on His Fanatical "Creed" Diet on "Good Morning America"

Creed star Michael B. Jordan is a man of many talents—and obviously a man of exceptional drive, as he revealed in an interview with Amy Robach of Good Morning America on Monday.

"There's a reason you're on the cover of Men's Fitness," said Robach, over some behind-the-scenes video from Jordan's Men's Fitness cover shoot. "What did it take to get to that point?"

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"Extreme diet change," Jordan said. "I stripped down my diet completely. Grilled chicken, brown rice, broccoli, a lot of water. I worked out two to three times a day, six days a week. And if you do that consistently for about 10 months, your body will change."

"We'll look just like you?" Robach asked.

"Something like me," Jordan said, either being humble (what a guy!) and/or completely honest that, yeah, he is really freaking jacked.

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He also talked about working with Sylvester Stallone, who was much a behind-the-scenes mentor to Jordan as Balboa is to Jordan's character, Adonis Johnson.

"[Stallone] took the pressure off me, not to compete or compare with anything he did 40 years ago," Jordan said. "Physically, I felt the pressure, because they did such a good job back in the day—Carl Weathers and Sly were really cut to a 'T.' So me and my trainer, we really wanted to set the bar pretty high."

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And while Jordan worked primarily with trainer Corey Calliet to develop his physical build, he turned to Stallone for his education in on-screen pugilism.

"Stallone knows movie boxing better than anyone else," Jordan said. "[When I] needed to sell a punch, or really 'telegraph this' or 'telegraph that,' he connected the dots for me."

Even his acting was extreme: He waited until filming the movie before running up the famous "Rocky Steps" of the Philadelphia Art Museum. He wanted it to be his "character's first time."

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Buy the December 2015 issue of Men's Fitness on newsstands now, or download it at MENSFITNESS.com/GetTheIssue. And check out Jordan in Creed, which opens nationwide on Wednesday, November 25.