In his third public outing, Archie is pictured in his mother's arms at the King Power Royal Charity Polo Day, held at Billingbear Polo Club in Berkshire on Wednesday.
The duchess and her two-month-old son were in attendance at the event to support the Duke of Sussex, who took part in the polo match in an effort to win the Khun Vichai Srivaddhanaprabha Memorial Polo Trophy.
Meghan opted for a casual look at the sports day, donning a khaki green short-sleeved dress, gold-rimmed sunglasses and wearing her hair down.
The royals watched as the Dukes of Cambridge and Sussex competed against one another, Prince William with the King Power Air Asia team and Prince Harry with the Tarmac team.
The aim of the polo event is to raise money and awareness for charitable organisations supported by the dukes.
It is held in memory of the late Leicester City chairman Vichai Srivaddhanaprabha, who died last October in a helicopter crash.
The images were taken by photographer Chris Allerton, who also photographed Prince Harry and Meghan at their royal wedding reception in May 2018.
In the pictures, Archie wears a replica of the Royal Christening Robe, a garment which has been worn by several members of the royal family.
On Thursday 4 July, Meghan made a surprise appearance at the Wimbledon Championships.
The duchess wore a gold necklace with a small "A" charm hanging from it, in an apparent nod to her son.
The delicate piece of jewellery was reportedly designed by Sydney-based jeweller Verse Fine Jewellery.