The floor-length gown is by designer THEIA, whose mission is to create dresses which make the woman who wear their designs feel confident and ready to shine, something the Duchess would most definitely relate to.
The brand's website states: "Inspired by the Greek Goddess THEIA, this evening wear, bridal and day dress collection was created to bring out every woman's inner goddess."
Meghan chose to wear her hair up, showing off the gown's embellished cap sleeves.
She accessorised with black heels and clutch.
Pregnant Meghan and Prince Harryarrived at Consular House in Tonga’s capital Nuku’alofa for a private audience with King Tupou VI and Queen Nanasipau’u.
They will then attend an official reception and dinner, featuring traditional entertainment.
As the couple arrived to the ceremony the a band played 'Imagine' by John Lennon.