Watch: Robert Irwin gives 4-year-old niece Grace a Dancing with the Stars lesson

Robert Irwin’s cutest dance partner yet? His 4-year-old niece Grace!

As Robert Irwin dazzles audiences on Dancing with the Stars, it turns out his biggest fan (and toughest coach) might be waiting for him at home.

In a heartwarming Instagram video shared over the weekend, Robert gave fans a glimpse into his off-stage training routine, featuring none other than his 4-year-old niece, Grace Warrior.

The daughter of Bindi Irwin and Chandler Powell, Grace stole the show as she twirled, kicked, and jumped alongside her proud uncle in their living room.

“Did I do it?” Grace asked mid-routine. Robert’s response? A beaming, “Yeah, that’s it!” followed by a cheeky declaration: “10s, all 10s. Everybody else can go home now, Grace has won.”

The adorable clip quickly won over fans, with Bindi chiming in from behind the camera, “Loved it!” and later commenting, “So proud of you, Robert. Grace has won!”

Robert, 21, is currently competing in season 34 of Dancing with the Stars with partner Witney Carson. 

Watch Robert and Witney's first dance below!

“I can’t help but get emotional when I talk about my family — they are everything to me,” he told Extra. “This process is the most incredible whirlwind adrenaline rush… and to have them there is everything to me.”

He added that the highlight of his night wasn’t just the judges’ scores, it was seeing Grace’s reaction. “She looked at me and she was like, ‘Yes!’ And I’m like, ‘If Grace is happy, I’ve won.’”

With Grace already “prepped and ready for season 50,” according to Robert’s caption, it looks like the next generation of Irwins might be headed for the dance floor too.