The touching meaning behind Meghan Markle's dress in her pregnancy announcement picture with Prince Harry

• Prince Harry and Meghan Markle shared a beautiful photo to announce they are expecting another child.
• Markle is seen wearing a maxi dress by Carolina Herrera, a touching nod to their son Archie.
• The dress was custom designed for Markle during her first pregnancy.

Meghan Markle and Prince Harry are expecting their second child, and they announced the news on Valentine's Day with a beautiful photograph.

The black and white shot was taken on an iPad by Nigerian-born British photographer, and long-time friend of the Duchess of Sussex, Misan Harriman.

A post shared by Misan Harriman (@misanharriman)

It shows the happy couple relaxing outside, Markle lying on her back with her hand on her baby bump, resting her head on Harry's lap, as Insider's Darcy Schild reported.

The couple's first child, Archie, is absent from the photo, but it turns out there's a touching nod to him that isn't immediately obvious.

The floaty maxi dress that Markle is wearing was made by Carolina Herrera, and was designed especially for her while she was pregnant with Archie, now 21 months old, People reported.

The Duchess, who is reportedly close with Carolina Herrera's creative director Wes Gordon, also wore dresses by the designer during her first pregnancy.

In February 2019, Markle wore a blue floral gown by the Venezuelan-American label while on a royal tour of Morocco. The stunning gown, which was available to buy for $2,990, was the Duchess' choice for a visit to the residence of King Mohammed VI in Rabat.

The royal family has said they are "delighted" with the Duke and Duchess' of Sussex pregnancy announcement, Insider's Mikhaila Friel reported.