Britain's Queen Elizabeth II and Meghan the Duchess of Sussex. Picture: AP Photo/Matt Dunham

The Duchess of Sussex carried an intimate reminder of her first date with Prince Harry when she walked down the aisle, ITV’s new royal documentary reveals.

ITV's two-part series "Queen of the World: - scheduled to premiere this week - celebrates the monarch's contribution to the Commonwealth, and how Her Majesty is handing down her duties and responsibilities to younger royal family members.

The Duchess of Sussex appears in the documentary to discuss her wedding veil which was embroidered with a signature flower from every commonwealth country.

As her ‘something blue’ from the traditional bride’s rhyme, Meghan asked to have stitched into the lining of her wedding dress a patch of fabric from the outfit she wore on the blind date when she met the Prince for the first time.

Hearing the revelation, a female curator of the Royal Collection at Buckingham Palace, where the dress is due to go on display, replied: ‘Oh, that’s about the most romantic thing I’ve heard.’

In another touching scene, Meghan is shown admiring her 15ft wedding veil, which famously featured embroidered floral decorations representing all 53 Commonwealth nations.

Meghan said it was her idea to incorporate the symbolism in a design which mirrored that of the Queen’s Coronation gown in 1953.

The Duchess revealed that the embroidery had been intended as ‘a fun surprise for my now husband, who didn’t know, and he was really over the moon to find out that I would make this choice for our day together’.

The documentary has been filmed over the period of a year and features access to the 92-year-old monarch, her family and staff, also drawing on cine footage from the Queen and Prince Philip's private film archives.

A recent clip was also shared of Prince Harry revealing that he 'still panics' when he sees the Queen.

Behind-the-scenes moments with Prince Charles, the Duke of Cambridge, and the Princess Royal will also be included.

Watch the trailer below.