Next up, inspiration from a marine here who lost a leg in afghanistan. But that did not stop him from starting a new career in an unlikely place, the world of fashion. There he is right there. And... See More
Next up, inspiration from a marine here who lost a leg in afghanistan. But that did not stop him from starting a new career in an unlikely place, the world of fashion. There he is right there. And abc's abbie boudreau has the story of his journey from the battlefield to the runway. Reporter: These sexy photos are steaming up the internet. This underwear model is more than just a guy with a rockin' bad.'S a marine, whose right leg was amputated after a roadside bomb nearly killed him in afghanistan. So, saw the pics. They're pretty hot. Thank you. Reporter: Did you know you had it in you? Not really. Reporter: He spent 47 days in a coma. He suffered brain injuries and severe burns to most of his body. I was running away from everything. Especially myself, in my own head. Reporter: Depression and alcoholism followed. But he followed back. He stopped drinking and started working out. I didn't want to run anymore. You know? I wanted to face my problems instead. Reporter: That's when a photographer spotted him at the gym and convinced him to give modeling a shot. He approached me. And he said, have you ever modeled? And he was, like -- wait a second. I'm serious. Have you ever modeled? He had a movie star face, with wild ink and sweat. And it was -- it was too hard to pass up. And alex wants to be an inspiration to people who move past their disabilities. Don't give up. Reporter: He took us through part of his four-hour daily workout. And there's one secret he swears by, avocados. I eat them all the time. Reporter: And now, he's hoping to be more an a model, but a role model to others. Inspire people. Inspire people and just, you know, get happy. Reporter: You're a marine before you're a model, though, right? Definitely. Once a marine, always a marine. Reporter: For "good morning america," abbie boudreau, abc news, los angeles.
This transcript has been automatically generated and may not be 100% accurate.