Britain's Prince Harry and his fiancee Meghan Markle. (AP Photo/Matt Dunham)
Britain's Prince Harry and his fiancee Meghan Markle. (AP Photo/Matt Dunham)
Britain's Prince Harry and Meghan Markle. Prince Harry will marry American actress Meghan Markle in the spring. (Eddie Mulholland/Pool via AP)
Britain's Prince Harry and Meghan Markle. Prince Harry will marry American actress Meghan Markle in the spring. (Eddie Mulholland/Pool via AP)
Britain's Prince Harry and his fiancee Meghan Markle hold hands.  (AP Photo/Matt Dunham)
Britain's Prince Harry and his fiancee Meghan Markle hold hands. (AP Photo/Matt Dunham)

Meghan Markle caused Line the Label's website to crash as fans tried to purchase the outfit she wore at a photocall after news of her engagement was announced on Monday.

The 36-year-old actress and her 33-year-old fiancé Prince Harry posed for pictures at the White Garden - a memorial spot for the royal's late mother Princess Diana - in the grounds of Kensington Palace this morning, just moments after it was confirmed the couple are taking their relationship to the next step. 

Britain's Prince Harry and Meghan Markle. Prince Harry will marry American actress Meghan Markle in the spring. (Eddie Mulholland/Pool via AP)

During the appearance, the star donned a chic white wrap coat from the Toronto-based brand's Autumn/Winter 2017 collection, which supporters were desperate to get their hands on. 

And just moments after the couple made their debut appearance as an engaged couple, and details of Meghan's attire were shared, the e-store went down. 

Meghan paired the outfit with a forest green dress, with a side bow detail on the waistline, designer by a Milan-based fashion house P.A.R.O.S.H, which retails for just under R6900.

Britain's Prince Harry and his fiancee Meghan Markle hold hands. (AP Photo/Matt Dunham)

The star finished off her simple yet elegant look with nude Matilde Crisscross Suede Aquazzura heels, which boast a 105mm platform and have an ankle strap, and retail for approximately R5500.

Meghan - who has been dating the 33-year-old royal for over one year - also flaunted her glitzy engagement ring, which is made of three-stones; a larger central stone from Botswana - where the couple enjoyed a safari holiday in September - that is positioned between two diamonds taken from his late mother's, Princess Diana, personal collection.

But that was not the only piece of stunning jewellery the star wore as she also donned a pair of 18 karat yellow gold earrings fitted with white opals in the centre. 

And the Les Plaisirs de Birks items are retailed for a whopping R15 500. 

The happy news was announced yesterday in a royal statement issued by the prince's father, Prince Charles, when it was also revealed the wedding will take place next year. 

It stated: "His Royal Highness, the Prince of Wales, is delighted to announce the engagement of Prince Harry to Ms. Meghan Markle.

"The wedding will take place in Spring 2018. Further details about the wedding day will be announced in due course.

"His Royal Highness and Ms. Markle became engaged in London earlier this month."