In the picture, the toddler dressed in a pale blue frock with a white bow in her hair can be seen smiling at a birthday picnic hosted by her parents at Frogmore Cottage in Windsor.

The photo was taken by a family friend Misan Harriman, a spokesperson for the duke and duchess said as quoted by UNI.

Harriman also shared three photos on his Twitter account and said, "It was such a privilege to celebrate the 1st birthday of Lilibet with my family and hers! Joy and face painting all around."

A spokesperson for the Sussexes said that more than $100,000 (£79,800) worth of donations had been made in their daughter's honour by people around the globe to World Central Kitchen - an organisation providing meals for those affected by humanitarian, climate and community crises, BBC reported.

Prince Harry and Meghan had named their daughter 'Lilibet' after the Royal Family's nickname for the Queen, the toddler's great-grandmother.

Her middle name is Diana, chosen to honour her "beloved late grandmother".

BBC quoted the couple as saying that they were "incredibly touched" by birthday wishes they received for their second child, who was named in honour of the Queen.

On Friday, the couple made their first public appearance in Britain together since 2020 when they had participated in a service of thanksgiving for the Queen at St Paul's Cathedral.