Prince Harry accompanied new wife Meghan this time as they welcomed celebrities including David Beckham and Sir Lenny Henry to the Queen’s Young Leaders awards.
The Young Leaders scheme celebrates the achievements of young people from across the Commonwealth.
This year’s youngsters have been praised for their work on issues including mental health problems, gender equality and climate change.
Other stars at the event included boxer Nicola Adams, presenters Ore Oduba and Tina Daheley, YouTuber Caspar Lee, model Neelam Gill and chairman of the Queen Elizabeth Diamond Jubilee Trust, former PM Sir John Major.
It is the second time Meghan has joined the Queen on a royal engagement since her wedding to Prince Harry in May.
Crowds of schoolchildren waved Union flags and cheered as Meghan and Her Majesty arrived in Cheshire on a royal visit in June.
Kate, the Duchess of Cambridge, waited 10 months before she was invited on an away day with the Queen, which was a trip to Leicester.