According to KTRE, Abrie Lopez has used a wheelchair since childhood because of the illness, which restricts her mobility. But she's always wanted to walk.

"She's been working on this for a long time," her brother and caretaker, Adrian Lopez, told KTRE. "She's been going to therapy since she was like 6 or 7 months old."

Her hard work paid off Saturday when she walked across the stage to get her diploma at Diboll High School's graduation ceremony. A video of the touching moment shows the audience applauding and cheering her on.

>> Click here to watch

"I was like, 'Oh my gosh, I can do this all by myself,'" Abrie told KTRE.

"Don't give up," he told KTRE. "I mean, nothing can hold you back. If you have a dream, just follow your dream."