The three royals got suited and booted for the Business in the Community Gala dinner at the Royal Albert Hall in London on Tuesday evening, and they all opted for navy two-piece suits.
Walliams spotted a concert leaflet ahead of meeting and greeting Harry on arrival and suggested the two go and see Andre together. The Britain's Got Talent judge tweeted the following:
I just met Prince Harry and asked him if he wanted to come to see @MrPeterAndre in concert with me.
- David Walliams (@davidwalliams) July 8, 2014
Now that, we'd love to see.
The royals took to the stage together during the evening and even the Prince of Wales seemed pretty surprised that both of sons had chosen to join him. In his speech, the royal revealed that he was "proud, delighted and amazed that my own next generation has decided to accompany me here tonight."
In other news, have you seen I Wanna Marry Harry yet?