The staggering cost of Prince Harry and Meghan Markle's wedding

Prince Harry and his fiancee Meghan Markle. Photo / AP

Planning is underway for Meghan Markle and Prince Harry's royal wedding, the cost of which is slated to surpass even that of Prince William and Kate's lavish affair.

According to British wedding site Bridebook, the wedding comes with an estimated price tag of around NZ$80 million - about $30m more than Wills and Kate's reported $50m nuptials.

According to the site, this should earn the royals a spot on the top ten most expensive weddings list.

The site also provided a breakdown of expenses, with the most pricey part being security.

It claims this will include everything from undercover police to snipers and drones, totalling roughly $75m.

Other key expenses include a $125,000 lemon elderflower wedding cake, $270,000 flowers, $64,000 sausage rolls and tea and of course, Markle's gown which is expected to come in somewhere between $750,000 and $1 million.

The countdown is on for the royal wedding, with invitations having recently been sent out and guest list rumours underway.