The Queen was joined by The Duke and Duchess of Cambridge at the world-famous Chelsea Flower Show, on what was the couple’s first visit to the event.
Also in attendance were Prince Harry, The Duke of Edinburgh and many more of Her Majesty’s family.
One of the highlights of the evening was the naming of a new pink and green chrysanthemum that has been named in honour of one-year-old Princess Charlotte.
They said: “This year the diary has worked out fine and especially in the Queen’s 90th year, Their Royal Highnesses were keen to join her.”
The new flower named in Princess Charlotte’s honour is being sold at Waitrose with half of the profits going towards the East Anglian Children’s Hospice, a charity of which the Duchess is Patton.
Prince William joked: ‘You could always steal one [of the flowers] off the exhibit!’ Kate jovially replied: ‘Waitrose are selling them!’
The Queen was shown around the grounds of the show, and when she saw some poisonous lillies that she had been presented with in the past week she quipped that they perhaps “wanted her dead”.
Security at the prestigious show has been increased after the recent terror attacks in Brussels and Paris.
The 90-year-old monarch was wearing, a light blue coat with a matching floral dress, and Kate wore a green Venetian wool coat dress by Catherine Walker.
The show which is hosted at the Royal Hospital, Chelsea, will be open to the public from Tuesday.