Transcript for America Strong: Little girl defies the odds and takes her first steps
Finally tonight here, the little girl who is America strong, proving her strength one baby step at a time. She was born ten weeks premature. There were stays in three different hospitals, four operations in 17 months. She's been treated for hydro receive lus, water on the brain, and her family feared she would never walk on her own. But her mother could see that fighting spirit. Yes! Reporter: Gaining strength, learning to crawl. Her older sister, smiling. Defying the odds. She's got it down now. Reporter: And just this weekend, look at this moment. A major milestone at the sliding glass door. She gets up and begins to walk. Here she comes. Ava, back up. Reporter: Walking across the dining room floor. Her mother watching. Yeah, girl. Oh, oh. Come on, girl. Yeah! Woo-hoo. Reporter: The fighter got right back up. And tonight, her family in Florida sending us this. Hi, David! Reporter: And sending us this new video just tonight. Good girl. Reporter: Her walking getting better and better. Say thank you. We're blessed. She's doing wonder. . Reporter: A kiss to the cheek for mom, her entire family rooting her on from the start. We're rooting her on, too, what a great way to start the week. I'm David Muir. I hope to see you right back here tomorrow. Good night.
This transcript has been automatically generated and may not be 100% accurate.