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If you’re reading this post, chances are you saw Iron Man 2 this weekend—or have plans to do so ASAP—and are lusting after Pepper Potts’s (played by the lovely Gwyneth Paltrow) soft, strawberry blond hair. We loved the delicate shade so much that we asked celebrity colorist Marie Robinson (who just opened her own salon in New York City!) everything you need to know to pull it off.

InStyle.com: Who does the shade work for?

MR: Anyone who is fair with pink or yellow undertones in their skin—the color can actually make them look more tan. Only thing is, if your hair is naturally dark brown, it could go brassy very easy. It’s really best for those with blond to light brown hair.

InStyle.com: What direction should you give your colorist? More

To get in shape for her role as Pepper Potts in Iron Man 2, Gwyneth Paltrow relied on a strict 5-day diet and exercise regimen, which she shared in her most recent Goop newsletter titled “The Making of Pepper Potts.” Her daily schedule included a breakfast of green tea and a shake made with detoxifying powders, an hour-and-a-half workout with trainer Tracy Anderson and a set of healthy vegetarian meals. “This regime got me into the shape of my life and I continue to return to it when I have a specific event—so that I can do ridiculous things like be a 37-year-old mother of two and wear shorts!” the actress wrote. Check out Gwyneth’s latest Goop newsletter for complete recipes and a video featuring one of Anderson’s workout tips.