Matthew McConaughey won gold when he married Camila Alves.
ET's Jennifer Peros caught up with the 47-year-old actor at the premiere of his new movie, Gold, in New York City on Tuesday, where he praised his wife of four years for "uprooting everything" to support his film projects.
"You do all this work and people see it, and when they see it, they think you made it last week," McConaughey explained, "But some of us have been a part of it for five years. We picked up the family, uprooted everything, went to Thailand, did it, they came with me."
"I have a wife that thankfully tells me when I go to work, 'Don't look in the rearview mirror. Go do your work, get obsessed with that. I got it. I got your back.' So it makes the whole process so much more enjoyable for me," he added.
McConaughey says making Gold was fun for the whole family, and not just because his three kids, 8-year-old Levi, 7-year-old Vida and 4-year-old Livingston, had Thailand as their backyard.
"It was a wonderful ride. They were very happy. I was very happy with you know the Kenny Wells part of me that I brought home," he said, admitting that he brought qualities of his eccentric character home with him, including packing on almost 50 pounds to play the thrill-seeking businessman. "My nickname was Captain Fun for six months 'cause I was yes to pizza night, even if it was Tuesday morning. I was yes to going to the carnival at midnight on a school night. I was like yes, yes, yes."
While the Oscar winner admits that he's had to scale back Kenny Wells a little bit since wrapping production, he still holds the character in high esteem.
"Kenny Wells' indulgences work for six months and then I had to come back and tighten up a little bit, but he's a wonderful character," he shared. "A wonderful American archetype. He's my favorite character I've ever played."
As for his mom's reaction to the character? "She kind of said, 'Matthew, what... oh jeez... well... I like it better than when you were really, really skinny. Golly. You look like your dad. OK, I guess you gotta do what you gotta do,'" McConaughey revealed.
Gold hits theaters on Jan. 27.
Hear more on McConaughey's Gold transformation in the video below.