Pair were inseparable at the annual event as Kate looked resplendent in Catherine Walker.
Body language expert Judi James draws the similarities.
Queen Elizabeth II's 90th birthday party went outdoors to hold a picnic featuring a sumptuous spread.
Rain did little to dampen enthusiasm of 10,000 revellers.
To celebrate the Queen's 90th birthday, the crowd were treated to a royal debut by Princess Charlotte
Queen Elizabeth II loves to treat herself to dark chocolate and wine.
Sir Ian Wood, Paul Marshall, Philip Hulme and Terry Morgan are the other four knights from the business world.
The Duchess of Cambridge said she is relying on Prince George to keep her daughter 'in order.'
The Duke of Cambridge said he will be cheering on the team as England takes on Russia on Saturday.
As the Queen celebrates her official 90th birthday, IBTimes UK looks back at the evolution of her style
Duchess of Cambridge wore custom-made powder blue coat dress by Catherine Walker.
The royal family attended St Paul's Cathedral for a service celebrating the Queen's 90th birthday.
The Duchess of Cambridge met athletes who will be competing in the forthcoming Rio 2016 Olympics.
Founder's Day commemorates King Charles II escaping from parliamentary forces after the Battle of Worcester.
On 10 June 2016, Prince Philip turned 95, making him both the longest-serving spouse of a reigning British monarch and the oldest male British royal of all time.
The monarch's cult of personality has been likened to North Korea fervour for its supreme commander.
Spanish royals celebrate publication elEconomista's 10th anniversary.
Duchess of Cornwall mirrored Elizabeth II in identical-coloured outfits.
He was born in Cambridge, Massachusetts, on 5 December 1927, while his father was studying at Harvard.
Prince Harry and Ellie Goulding were reportedly spotted getting cosy with each other at the Audi Polo Challenge.
Royal biographer Gyles Brandreth recalled an old conversation with Duke of Edinburgh.
The Spanish royals attended the exhibition at the Royal Palace in Madrid.
Flame-haired monarch has previously dated Chelsy Davy and Cressida Bonas
Royal left his boxing gloves at home for the occasion.
A new exhibition will showcase Her Majesty's style over the years.
Glittering Catherine Walker gown is also up for grabs in Kerry Taylor auction.
Prince Philip cancelled appearance at Battle of Jutland earlier this week due to ill health.
Not one, but two of late Princess Diana's ensembles are up for auction at The Saleroom.
The card features a photo of Charlotte and expresses gratitude for her birthday gifts and wishes.
The pair were out with Prince William and Princess Charlotte at an equestrian event near Anmer Hall.