It seems that Meghan Markle has a real grá for Ireland. Not only did she visit the emerald isle for her first royal engagement overseas with her husband, Prince Harry, but she wore an Irish design for her first outing as Duchess - a hat by Galway milliner Philip Treacy.

Next, she chose a picture taken by Irish photographer Gerry Mooney to feature on her official Thank You cards.

Now, the pregnant Duchess has gone a step further by wearing a gorgeous white gown from Don O’Neill’s designer brand, Theia.

The Irish designer posted a photo of Meghan wearing the gown with the caption: "Her Royal Highness, The Duchess of Sussex Wearing @theiacouture!!!!!!!! OMG I am so excited I can barely hold my phone !!!#Woohooo"

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The Duke and Duchess of Sussex are currently travelling Australia, New Zealand, Fiji, and the Kingdom of Tonga as part of their first royal tour together.

She wore the custom gown while on a visit to the Consular House in NukuÕalofa for a private audience with King Tupou VI and Queen NanasipauÕu in Nuku'alofa, Tonga. 

Theia Couture shared details of the custom ivory crepe column gown to Instagram explaining that the piece featured "flanged shoulders, a jewel neck, and side slit". The shoulders are detailed with "hand embroidered appliques of crystals and micro glass beads".

Meghan design
From Theia Couture's Instagram

All in all, the couple will have completed a whopping 76 engagements in just 16 days during this tour, which means that Meghan will need up to three outfit changes per day.

Luckily, it has been reported that her stylist and best friend Jessica Mulroney has joined her on the tour and, by the looks of things, she's got good taste.