This week, Entertainment Tonight caught up with the cast of Iron Man 2 in an exclusive interview right on the movie set. Robert Downey Jr, Scarlett Johansson, Gwyneth Paltrow and many other cast members think that the next Iron Man installment is going to be a huge hit. During the interviews the cast also shed some light on their rigorous training for their roles in the movie. Robert Downey Jr had to work particularly hard because he had slimmed down for his role in the Sherlock Holmes movie and then put on 15 pounds of pure muscle for his role as Iron Man. He said he worked ’smartly and safely’ to gain the weight and it appears he’s a natural when it comes to exercise. He told ET,

“I love fitness, you know I love martial arts and choreography.”

Gwyneth Paltrow said she couldn’t believe that for her role in the film she had to wear bikinis and little outfits and she looked good in them. She’s definitely proud of herself. But it was Scarlett Johansson who probably had the biggest task of the three celebrities because since she played the part of the Black Widow she had to do a lot of martial arts training. When asked what she did to prepare for the role, she responded,

“I adopted a healthy lifestyle, strength training and core workouts.”

Iron Man 2 will be in theaters in May 2010.

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