She began dancing at age 4 and never stopped. She trained in Utah with some of the nation's top teachers in Shirley and Mark Ballas.
She took 1st place in both the United States Open Youth Latin Championships and the United States Open Junior Latin Championships. She was also a top 3 finalist at the World Junior Latin Team Match.
She has three younger sisters, Rylee, Jensen and Brynley. The four sisters run the collaborative YouTube channel The Arnold Sisters together. She married Samuel Lightner Cusick in 2015. Their first child, a daughter named Sage, was born in November 2020. They welcomed their second daughter, June, in May of 2023.
She was partnered with Victor Ortiz on her first season of Dancing with the Stars.