They met with a Shetland pony, who was also wearing a tartan coat.
"Pony Major Mark Wilkinson, who handles the mascot, said "[Prince Harry and Markle] said it was lovely to meet him".
Meghan's coat is from Burberry - a steal at £1,995.
The Lord Lieutenant introduced the royal visitors to Susan Wilson Principal Officer of the American Consulate in Edinburgh, Depute Council Leader Cammy Day, Alex Paterson CEO of Historic Environment Scotland and Rev Calum MacLeod of St Giles Cathedral. Kensington Palace said the ceremony will be officiated by the Dean of Windsor, the Right Reverend David Conner; and the Archbishop of Canterbury, Justin Welby.
What's more, the couple will parade through the streets after leaving Windsor Castle via Castle Hill and preceding the High Street through the town of Windsor during their walk.
Harry's dad, Prince Charles, will later host a private evening reception for just close friends and family. Thankfully, Meghan was dressed for the occasion. So while Meghan might be emulating her fiancé's late mother, it could very well be Harry's influence.
And Camilla was also caught unawares, albeit by a different horse, when she visited an equestrian centre in Brixton, South London in February a year ago. "So for Social Bite to give me a chance of having a job... it's totally changed my life".
They hit it off immediately and just weeks later jetted to Botswana together.
She was even gifted with a number of red roses - thought we're not too sure what Harry would have had to say to her admirers.
Clearly delighted, Meghan laughed out loud at her man's mishap.
Some aren't surprised by her initiative, though.
Luckily, the pony missed Harry's fingers.
The royal visit put Social Bite on the global map, making national TV headline news around the globe. We know we are.
According to ET Online, none other than Ed Sheeran, as in the dude who's song has probably played at 99% of the weddings held in the past 2 years, was asked by Harry and Meghan to play a few songs at their wedding on May 19th.
Meghan has now quit her role on Suits - and acting in full - to move to London.