Dancing With the Stars‘ 20th anniversary episode was full of ballroom royalty, as well as featured an appearance from actual royalty.

During rehearsals for their latest routine, Robert Irwin and Witney Carson were surprised via video chat from none other than Prince William. “Hey, Robert. How are you doing?” he asked Robert, who noted before the call that his DWTS progress caused him to miss this year’s Earthshot Prize event in Brazil.

Originally published on tvinsider.com, part of the BLOX Digital Content Exchange.