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Robert Irwin has wowed US audiences by stripping off his shirt mid-routine during his salsa performance on Dancing With The Stars.

The 20-year-old Aussie wildlife warrior danced to Million Dollar Baby with his partner Witney Carson on Tuesday night, earning cheers from the crowd as he showed off his abs and moves.

“Robert Irwin is all grown up. Wow, you’re making me feel like a grandmother,” judge Carrie Ann Inaba said. “Put your shirt back on. Great performance.”

Fellow judge Bruno Tonioli also praised the performance, comparing Irwin to Aussie actor Chris Hemsworth.

The high-energy routine scored the pair 22 points, placing them third on the leaderboard.

Fans have shared their reactions online, with many fawning over the wildlife warrior saying they they were “having heart palpitations” and “need oxygen”.

Despite the duo placing third on the leaderboard this week, one fan said: “I thought this was the best dance of the night.”

“I disagree with the judges THAT WAS SPECTACULAR,” a third commented.

Irwin is also rumoured to be earning a tidy sum for his time on the show – reportedly starting at $US125,000 ($A188,000) for his first two weeks, with potential earnings of up to $US400,000 ($A606,000) depending on how long he stays in the competition.

His sister Bindi Irwin won the US version of the show back in 2015.