The new exhibition is taking place at the Southbank Centre in Queen Elizabeth Hall, and pays tribute to the great South African leader.
Arriving at the viewing the Duchess went for a bold new look, wearing a sleeveless coat dress.
Despite the scorching hot weather, Meghan opted for the full-length trench-style dress that came to just below her knees.
It was pale pink in colour, a favourite shade worn by the 36-year-old on many occasions since her wedding to Harry.
Made of a light-weight material, the summery coat dress was by Canadian fashion house Nonie.
More afforable than her previous lavish looks, it retails for $ 1,085 Canadian dollars, around £625, and is still in stock on the brand’s website.
The blush pink coat dress elegantly framed Meghan’s slender figurer, cinched in at the waist with a thick tie belt.
Drawing even more similarities from a traditional trench coat, it featured large black double-breasted button detailing.
Showing off her décolletage, the coat featured a wide open collar, with layered material detail on the lapels.
Seeing the pale pink theme through, the Duchess wore an elegant pair of pale pink pointed-toe stiletto heels.
She also carried a large pink clutch bag with three compartments, in the perfect shade of matching blush pink.
The dress coat was reminiscent of the glamorous 1960’s style of former US First Lady Jackie Kennedy.
Adding more elegance and 1960’s glamour the stylish ensemble, Meghan wore her glossy dark hair up in an updo.
A change from the slicked back hair styles she wore in Ireland at at a recent Commonwealth reception, her loose bun allowed strands of hair to frame her face.
Her makeup also followed the all-pink theme, with a rose pink lip, pink highlighter and blusher and a brown smokey eye.
The Duke and Duchess of Sussex were visiting the display that mars one hundred years since Mandela’s birth.
On a 2015 trip to South Africa, Prince Harry visited Mandela’s Robben Island cell where he spent 18 years imprisoned by the apartheid regime.
The royal couple are no stranger to touring poignant exhibitions, having spent time at the famine memorial on their visit to Ireland last week.
On their whistle-stop two-day tour, the couple learnt about the famine and the consequantial emigration in Ireland.