Reality star Sadie Robertson is one of 13 celebrities set to compete on ABC's Dancing With the Stars this fall and it seems that she's already excelling with some "sassy" dance moves.

Dancing With the Stars New Pros Talk "Challenging" First Day

Robertson, 17, is a member of the polarizing family featured on A&E's Duck Dynasty and she admitted in new rehearsal footage that she only dances in her room, alone.

"My dance skills kind of stay in my room," she reveals in a new video, per Us Weekly. "It's only for me and my mirror to see!"

Julianne Hough Won't Be a Mean DWTS Judge, Though She Will Be "Honest"

She shows off some of her favorite dance moves in the video, saying that it makes her feel "real sassy."

The video shows footage of her in rehearsals with her pro dancing partner, Mark Ballas, who says she is good at such moves.

As for her nerves going into Dancing with the Stars, she previously admitted that she'll probably get more nervous after the first episode.

"I'm more excited than nervous," she told Us Weekly after she was cast for the upcoming season. "I'm not really a shy person . . . but once the show actually starts, I'm sure I'm going to get nervous."

As Enstars previously reported, Robertson and Ballas will perform the Cha-Cha-Cha during Week 1 of the competition, according to leaked spoilers.

Dancing With the Stars Season 19 is set to premiere Monday, Sept. 15 at 8 p.m. ET/PT on ABC. A special results show will air on Tuesday at 8 p.m., where the first pair will be eliminated from the competition.

Watch the video of Robertson and Ballas rehearsing here:

Tags: Dancing with the Stars Reality TV ABC