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Prince William made a surprise appearance on " Dancing with the Stars " Tuesday night in support of contestant Robert Irwin.

Irwin told his dance partner, Witney Carson, while they were both seated in front of a tablet on the show that he had a "special call," adding, "I have absolutely no idea who it is."

"We’re missing you, Robert," the Prince of Wales told the conservationist and zookeeper, referring to the royal’s Earthshot Prize event in Rio de Janeiro. Irwin was supposed to join him there as an ambassador, but had to cancel because he's still competing on the show.

"Whilst your twinkle toes are going off elsewhere, I need you down here," William said.

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