Watch: Beale offers Prince William his budgie smugglers for Christmas

Kurtley Beale offered to give Prince William a pair of his budgie smugglers for Christmas after the Australia playmaker posed for a picture with the royal in his underwear on Saturday.

Beale had a day to remember at the Principality Stadium, starring in the Wallabies' 29-21 win over Wales before chatting to the Duke of Cambridge with a beer in hand in his bright green and gold trunks in the dressing room.

Credit: Rugby.com.au

The utility back posted a snap of himself and the suited-and-booted second in line to the throne on Instagram with the caption: "When you rock up to the party feeling a little over dressed."

Beale's post went viral and the 28-year-old said of his encounter with the famous Welsh Rugby Union patron: "I asked him [Prince William] if he wanted my ones that I had on. I'm sure we'll be able to organise a pair if he wanted some for Christmas."

He added: "I just came from the recovery room, I recover in ice baths, I love playing in my budgie smugglers, so they were the last things that I was wearing.

"I just happened to be taking it easy and it was pretty good to have a yarn with him in the sheds. Prince William is a really good guy, he's pretty down to earth,

"He actually threw a few jokes around with Bernard [Foley] and I, saying 'who had the better 'tache?'

"It was really good fun and it was nice to meet him. He said I had the better 'tache."