Matthew McConaughey’s Blonde Pigtail Hair Transformation

“For me, I go whatever the role that I’m playing needs,” the Interstellar actor—who shares kids Levi, 17, Vida, 16, and Livingston, 13, with wife Camila Alves McConaughey—previously said in 2015. “So if I’m doing an action movie or a football player, I go to the gym and hit weights.”

But it hasn’t always been an easy process. In fact, when Matthew had to gain weight for his 2016 thriller Gold, he found that putting on pounds without adding muscle mass was rather challenging.

“I haven’t ever done that,” he told E! News in 2017. “I said, ‘McConaughey, you have six months to say yes to whatever you want to eat and whatever you want to drink. Whenever.’ That was fun. The only thing that gets tiring is the thought of quitting. It was fortunate that I was like, ‘Oh, this is also my job, so let’s go—all green lights.'”