Platinum Jubilee: Duchess of Cambridge chic in lemon yellow for Service of Thanksgiving

Britain's Catherine, Duchess of Cambridge waves to well-wishers as she leaves after attending the National Service of Thanksgiving for The Queen's reign at Saint Paul's Cathedral in London on June 3, 2022 as part of Queen Elizabeth II's platinum jubilee celebrations. - Queen Elizabeth II kicked off the first of four days of celebrations marking her record-breaking 70 years on the throne, to cheering crowds of tens of thousands of people. But the 96-year-old sovereign's appearance at the Platinum Jubilee -- a milestone never previously reached by a British monarch -- took its toll, forcing her to pull out of a planned church service. (Photo by Daniel LEAL / POOL / AFP) (Photo by DANIEL LEAL/POOL/AFP via Getty Images)
Duchess of Cambridge, smiles as she arrives to attend the Service of Thanksgiving to mark 70 years of the Queen's reign. (POOL/AFP via Getty Images)

The Duchess of Cambridge attended the Service of Thanksgiving on Friday as part of the Queen's Platinum Jubilee wearing a lemon yellow dress and matching hat.

Kate, 40, arrived in the Emilia Wickstead dress and Philip Treacy hat with the Duke of Cambridge at St Paul's Cathedral in London, looking cheerful as they walked up the steps into the church, greeting the clergymen.

They arrived shortly after Prince Harry and Meghan Markle, the first time the four have been seen together in public since March 2020.

The service marks the Queen’s reign, spanning seven decades as monarch.

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LONDON, ENGLAND - JUNE 03: Catherine, Duchess of Cambridge attends the National Service of Thanksgiving at St Paul's Cathedral on June 03, 2022 in London, England. The Platinum Jubilee of Elizabeth II is being celebrated from June 2 to June 5, 2022, in the UK and Commonwealth to mark the 70th anniversary of the accession of Queen Elizabeth II on 6 February 1952. (Photo by Karwai Tang/WireImage)
The Duchess of Cambridge wears Emilia Wickstead dress and Philip Treacy at the Service of Thanksgiving. (WireImage/Getty Images)

Great Paul, the largest bell in the country, was rung for the service ahead of the arrival of the Royal Family, which also included Price Charles and Camilla, the Duchess of Cornwall.

Kate and William, who wore a black suit, with his service medals on display, were seated between Camilla and Princess Anne.

The service included a new anthem by Judith Weir, Master of the Queen's Music, that sets to music words from the third Chapter of the Book of Proverbs.

The Cambridge's three children, Prince George, eight, Princess Charlotte, seven, and Prince Louis, four, weren't in attendance. They did, however, enjoy the jubilee celebrations on Thursday, including joining their great-grandmother the Queen on the balcony for Trooping the Colour, with Louis stealing the show.

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Catherine, Duchess of Cambridge, hair detail, attends the National Service of Thanksgiving at St Paul's Cathedral on June 03, 2022 in London, England. The Platinum Jubilee of Elizabeth II is being celebrated from June 2 to June 5, 2022, in the UK and Commonwealth to mark the 70th anniversary of the accession of Queen Elizabeth II on 6 February 1952. (Photo by Karwai Tang/WireImage)
Duchess of Cambridge's hair detail, her earrings on show. (WireImage/Getty Images)

It was announced by Buckingham Palace after Thursday's daytime events that the Queen would not attend the service at St Paul's.

With Prince Charles officially representing the Queen on Friday, she instead watched the service on TV from Windsor Castle.

“The Queen greatly enjoyed today’s birthday parade and flypast but did experience some discomfort,” a spokesperson said in a statement.

“Taking into account the journey and activity required to participate in tomorrow’s National Service of Thanksgiving at St Paul’s Cathedral, Her Majesty with great reluctance has concluded that she will not attend.”

However, she still participated in Thursday evening's beacon lighting at Windsor Castle.

This followed an earlier announcement on the same day that Prince Andrew has tested positive for COVID-19 and would not be attending the Service of Thanksgiving.

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Duchess of Cambridge, the Duke of Cambridge, the Duchess of Cornwall and the Prince of Wales during the National Service of Thanksgiving at St Paul's Cathedral, London, on day two of the Platinum Jubilee celebrations for Queen Elizabeth II. Picture date: Friday June 3, 2022. (Photo by Victoria Jones/PA Images via Getty Images)
The Duchess of Cambridge, the Duke of Cambridge, the Duchess of Cornwall and the Prince of Wales during the National Service of Thanksgiving at St Paul's Cathedral on Friday June 3, 2022. (PA Images via Getty Images)

Kate was last seen wearing a white recycled Alexander McQueen blazer dress for the Trooping the Colour ceremony on the first day of the jubilee celebrations, and a navy white hat, also by Philip Treacy.

George, Charlotte, and Louis joined their mother, and Camilla, in the first carriage for the Queen's Platinum Jubilee birthday parade along The Mall.

Traveling from Buckingham Palace to Horse Guards Parade, the three siblings all dipped their heads and saluted the colour, showing they had been schooled on the etiquette of the event.