The Princess of Wales dazzled in a sequinned red evening gown and the Lotus Flower Tiara as the royal family welcomed diplomats to Buckingham Palace while the wait for the Duke and Duchess of Sussex’s Netflix docuseries intensified.

Kate joined the Prince of Wales, the King and the Queen Consort for the first Diplomatic Corps reception in three years as they greeted hundreds of guests at the glittering affair in London on Tuesday evening.

Meanwhile in the US, Harry and Meghan were in New York, preparing to accept the Ripple Of Hope Award for their racial justice and mental health work from Robert F Kennedy Human Rights (RFKHR) organisation.

Diplomatic Corps reception at Buckingham Palace
The Princess of Wales during the Diplomatic Corps reception at Buckingham Palace (Victoria Jones/PA)

The couple’s tell-all show is just hours from being aired by the streaming giant on Thursday, and the royal family is bracing itself for bombshell revelations, with Harry speaking of a “hierarchy in the family”, a “dirty game”, and warning “We know the full truth”.

The event at the Palace is the first Diplomatic Corps reception of the King’s reign, and the monarch, his consort Camilla, eldest son and heir to the throne William and daughter-in-law Kate, a future queen, welcomed foreign ambassadors to the grand occasion in the royal residence’s state rooms.

Kate, with her hair worn down and straightened without her trademark waves, was dressed in a floor length scarlet Jenny Packham dress decorated in sequinned flower motifs, as well as her a blue Royal Victorian Order sash and the late Queen’s Family Order, which sits on a yellow ribbon.

Diplomatic Corps reception at Buckingham Palace
Kate meeting guests (Victoria Jones/PA)

Her drop diamond earrings belonged to Queen Elizabeth II.

The princess has worn the Lotus Flower Tiara – also known as the Queen Mother’s Papyrus Tiara – previously.

Made of diamonds in fanned motifs crowned by floating diamond arches, it belonged to Princess Margaret.

Diplomatic Corps reception at Buckingham Palace
The Queen Consort at the reception (Victoria Jones/PA)

Kate also wore it to the diplomatic reception at the Palace in 2013, and to her first state banquet in the UK in 2015 during the Chinese state visit.

Camilla once again wore the late Queen’s diamond and sapphire tiara and necklace, which she chose for the South African state banquet last month, and an Anna Valentine gown.

The late Queen was set to host the white tie gathering in March this year at Windsor Castle, but it was postponed due to Russian’s invasion of Ukraine.

Diplomatic Corps reception at Buckingham Palace
The King during the Diplomatic Corps gathering (Victoria Jones/PA)

It is usually held every December, but there were no receptions in 2020 and 2021 due to the Covid pandemic.

The reception traditionally includes a buffet supper and dancing.