- Prince Louis, six, couldn't contain his excitement as he watched the flyover
- Read More: Gwyneth Paltrow sends surprise message of support to Kate Middleton following royal's triumphant Trooping the Colour appearance
The Royal Family put on a very animated display when they appeared on the Buckingham Palace balcony for the King's official birthday celebrations on Saturday.
King Charles and Queen Camilla were joined by the Prince and Princess of Wales and their three children, the Duke and Duchess of Edinburgh and their daughter Lady Louise Windsor and Princess Anne and Sir Timothy Laurence to watch the flyover.
Speaking to FEMAIL, lip reader Juliet Sullivan says Prince Louis made an adorable comment to the Princess of Wales after three RAF typhoons had passed over the Palace.
When his mother asked if he had 'liked' them, the six-year-old turned to face Kate and said: 'Did you see it go past?!'
Beaming at her youngest child, the Princess of Wales replied: 'Yes!'
Pictured: The Princess of Wales beams at her youngest son during the Royal Family's Buckingham Palace appearance for Trooping the Colour on Saturday
When they first stepped out on the balcony, Prince William directed his children on where they should stand.
He told them: 'You stand in front and I'll go past you. Go in front of me.'
Meanwhile, King Charles looked out over the crowd and said: 'This is lovely!'
As the first helicopters flew over the Palace, William looked down at Louis and said: 'Such a good noise!' Louis then replied: 'Yeah!'
As they waited for the next round of planes to pass, the Prince and Princess of Wales commented on the weather, which varied between heavy showers and sunny intervals on Saturday.
Looking up at the sky, William said: 'The weather isn't too bad now.'
The Princess of Wales replied: 'Yes, it's just a shower now.'
What's more, Juliet says Prince William and Prince George were happily identifying the aircraft as they approached the Palace.
At one point, the Prince of Wales leaned down to tell his eldest son: 'You know that is a jet.'
Lip reader Juliet Sullivan says William and George (pictured) were happily trying to identify the aircraft as they approached
Lip reader Juliet Sullivan says King Charles (pictured with Queen Camilla) commented on the 'lovely' view as he stepped out on the balcony
Pictured: The Prince and Princess of Wales with their three children on the Buckingham Palace balcony on Saturday
Spotting another in the distance, the royal later told all three of his children: 'They are typhoons.'
The Prince also pointed out the 'Hawks' and explained to George, Charlotte and Louis how the 'military train them'.
At one point, Princess Anne turned to her family for help identifying the planes.
The mother-of-two asked: 'Is that the Voyager? Or the Atlas?'
Later, the Duchess of Edinburgh appeared to remark that some of the aircrafts had been 'really quiet'.
King Charles also said during the flyover: 'Here they come! Look over there.'
As the national anthem began playing, Princess Charlotte was seen telling her brother 'to put his hands down'
Pictured: the Red Arrows flew over London to mark King Charles' official birthday celebrations on Saturday
Pictured: RAF planes seen approaching Buckingham Palace as part of King Charles' birthday celebrations
After the flyover ended, the Royals remained on the balcony to hear the national anthem.
As it began, Princess Charlotte discreetly gave Louis some advice - as he appeared to have his hands resting on the balcony.
Turning to her brother, Charlotte said: 'Louis, put your hands down.'
Saturday's Trooping the Colour was the first time the Princess of Wales had appeared in public following her shock cancer diagnosis earlier this year.
On Friday night, the Princess of Wales released a moving personal statement on her cancer treatment.
The royal said: 'I have been blown away by all the kind messages of support and encouragement over the last couple of months.
'It really has made the world of difference to William and me and has helped us both through some of the harder times.'
It continued: 'I am making good progress, but as anyone going through chemotherapy will know, there are good days and bad days.
'On those bad days you feel weak, tired and you have to give in to your body resting. But on the good days, when you feel stronger, you want to make the most of feeling well.
The Princess then went on to say she was 'learning to be patient, especially with uncertainty'.
She signed off the statement with: 'Thank you so much for your continued understanding, and to all of you who have so bravely shared your stories with me.'
