Speculation continues ahead of the royal wedding this weekend.

Prince Harry and Meghan Markle will be tying the knot at Windsor Castle this Saturday New Zealand time.

It's believed Markle will have two wedding dresses on the day.

What Kate Wore website editor Susan E Kelly told Mike Hosking people are already comparing what Markle will look like to what Kate Middleton looked like on the day of her wedding.

"Meghan and Harry don't have to abide by the uber-strict rules of being the next in line to the throne, so she can be a little more free in her fashion choices."

LISTEN TO SUSAN E KELLY TALK WITH MIKE HOSKING ABOVE