United Kingdom, Nov. 12 -- Prince William made a surprise guest appearance on Dancing With The Stars on Tuesday night (11.11.25).

The 43-year-old prince appeared on the celebrity dancing show via video link to wish contestant Robert Irwin "best of luck".

Ahead of his latest performance alongside his professional dancer partner Witney Carson, Robert told his sister Bindi Irwin - who won the 2015 version of the show - how he had made a huge sacrifice to continue with the series, because he was due to appear alongside William at the Earth Shot Prize in Rio de Janeiro, Brazil, last week.

However, he couldn't make it because he was still training for the show.

Robert and Witney then had to take a break from their dance preparations to rece...