Bridegrooms in royal weddings traditionally choose supporters instead of a best man. 

But Prince William actually broke tradition for his own 2011 wedding when he appointed his younger brother as his ‘best man’. 

Similarly Prince Phillip instead opted to have a best man, the Marquess of Milford Haven.

Grant Harrold, former royal butler to the Prince of Wales and the Duchess of Cornwall, told Express.co.uk: “Royals sometimes have best men and sometimes they have what are called supporters, but you can have more than one. 

PRINCE HARRY'S STAG DO REVEALED

“To have supporters is a royal tradition. It’s a nice tradition. 

“I think it’s a role that instead of a best man, a supporter has got a quite a nice ring to it, it’s something a bit different that the royal family can call upon if they wish to.” 

Harry’s father Prince Charles asked his brothers Prince Andrew and Prince Edward to be his ‘supporter’ when he married Princess Diana in 1981 and similarly Edward asked his older siblings to support him on his wedding day. 

But Mr Harrold, etiquette expert, said it is likely Harry, 33, will return the favour to his older brother when he eventually marries - breaking royal tradition once again. 

He added: “Prince Harry could have Prince William or one of his best friends as his best man.

“I think he’ll go modern and opt for a best man,” rather than appoint supporters. 

Following Prince Harry’s engagement to US actress, Meghan Markle, Prince William expressed his delight. 

The 35-year-old royal said: "We're very excited, delighted for them both.

"We're wishing them all the happiness at this very exciting time." 

He then joked: "Personally, I hope it means he stays out of my fridge and will stop scrounging all my food, which he's done for the last few years."