Prince William and Kate have a jam-packed schedule this weekend as royal family and people across the UK celebrate the Queen's Platinum Jubilee.
Joined by their three children for the Trooping of the Colour on Thursday, the Duke and Duchess of Cambridge also attended a service of thanksgiving for Her Majesty at St Paul's Cathedral yesterday.
Following the event, the senior royals were pictured chatting on the cathedral steps before their car arrived to take them to the lunch reception at Guildhall.
Now, a lipreader has revealed what he believes the couple said to each other - including a clear instruction Prince William gave to Kate, the Mirror reports.
According to lip reading expert John Cassidy, as they emerged on to the steps, Kate remarked on the service saying: "It went very well, very well" with William replying: "Yes, perfect."
Afterwards, William could be seen waving to the crowd saying hello, and Mr Cassidy says the prince then turned to Kate and said: "Wait for that to move, then we can go.
And Kate and William's exchange isn't the first conversation a lip reader has picked up from the Jubilee celebrations.
On Thursday, fellow lip reader Jeremy Freeman told The Mirror about Prince Louis's burning question for the Queen during the Trooping the Colour balcony appearance.
He noticed that Louis asked: "Are the Red Arrows coming?" to which the Queen very dryly replied: "I hope so."
When the Red Arrows did show up and painted the sky red, white and blue, Louis' excitement seemed to peak after Mr Freeman says the youngster exclaimed: "Yes yes yes."
He also added that the Queen then said: "There it is" before Louis added: "Oh Red Arrows - whoah."
Kate and William joined Prince Charles, Camilla, the Wessex family, Princesses Beatrice and Eugenie and other members of the royal family for yesterday's Service of Thanksgiving, which marked the second day of the Queen's Jubilee celebrations.
It was also the first time they've publicly reunited with Meghan Markle and Prince Harry since the Sussexes made a series of claims about them in their interview with Oprah Winfrey. Meghan said her sister-in-law made her cry while Harry said his brother was "trapped".
After the service the Cambridges joined other members of the royal family at a lunch reception at London's Guildhall, however Meghan and Harry decided to skip the do.
Kate gave fellow guest Gill Smallwood, from Bolton, an update on the Queen after she was forced to miss the day's events due to health issues. It's since been announced that the Monarch will also miss Saturday's Epsom Derby.
Kate, who was wearing a yellow dress by Emilia Wickstead and a Philip Treacy hat, told her: "Yes, she was fine, it was just very tiring yesterday. She had had a lovely, lovely time."
The Duchess also revealed that her children, Prince George, Princess Charlotte and Prince Louis also thoroughly enjoyed Trooping the Colour, in which they made their carriage debut before heading up to the Buckingham Palace to watch the flypast from the balcony with their great-granny.
She said they had a "lovely time".
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