The moment Harry tells Meghan to curtsy to the Queen

Meghan Markle in off-the-shoulder pink outfit

All eyes were on the duchess as she passed another royal milestone, joining the Queen for an event without her husband for the first time.

One of the most talked about aspects of Meghan's life however is her relationship with her grandmother-in-law, the Queen.

She paired the frock with matching clutch, belt and shoes.

"I think it was the last moment probably that she could reflect sort of the other side to her. the joy and the human within her".

Meghan stood out in an off-the-shoulder pink dress by Carolina Herrera on June 9 at Trooping the Colour, the official celebration of Queen Elizabeth's birthday.

Meghan Markle may now be the Duchess of Sussex, but she still has to defer to higher-ranking members of the royal family.

"The story was that Meghan's mom had come to my house and she left laden with gifts", Winfrey recalled.

On social media, there was plenty of discussion as to whether the Duchess was sending a very pointed message to her critics with the design of her dress.

As the queen passes by, Meghan looks straight ahead and smiles, while mouthing 'do it?' to Prince Harry.

Complimentary colours: Her Majesty wore a pistachio coloured coat by Stewart Parvin and hat by Rachel Trevor-Morgan.

See more in the video below.

They arrived in Cheshire onboard the royal train and are visiting the new Mersey Gateway Bridge and Chester.

'Meghan has opted for a much more designer wardrobe than some royals - but I feel on her part this may be due to wanting to make the ideal impression for her new in-laws. Meghan nodded and thanked her for the gift.

Speculation over who would design Markle's dress began as soon as the couple announced their engagement last November. "She looked great. There are no rules for the birthday parade, but I'm not sure it matters".

"The Duke and Duchess of Sussex will undertake an official visit to Australia, Fiji, the Kingdom of Tonga, and New Zealand in the Autumn", reads the announcement from Buckingham Palace.