The little girl, who was declared cancer-free earlier this year, pulled out her best moves as she graced New York Fashion Week in an all-denim ensemble.
"She was definitely feeling herself with that spin move," Devon wrote on Instagram, sharing a video of his daughter.
Leah's strut was a huge hit with the crowd, who erupted into applause.
Devon's daughter wasn't the only celebrity kid to show off during style's biggest week.
Victor Cruz, Nigel Barker and CC Sabathia's kids also walked in the show.
The former Bengals player shared a group photo with some of his fellow athletes and their well-dressed offspring.
"Nothing like a bond between a dad and his daughter," Devon wrote.
Leah's battle with neuroblastoma launched a national campaign to beat pediatric cancer, and she was honored with the Jimmy V Perseverance Award at this year's ESPYs.
Before the big show this Thursday, Devon and Leah stopped by Today to talk about her health with hosts Kathie Lee Gifford and Hoda Kotb.
"She's doing a lot better," Devon said on Today. "Her health has made a complete 180, and hopefully will continue to improve."