Order of the Garter: Prince Charles and Prince William attend
Beckham was among the A-listers lining up to pay tribute to a host of young people from across the Commonwealth this evening.
The Queen, looking resplendent in a floral dress, beamed as she welcomed Beckham ahead of the ceremony in London this evening.
She also greeted comedian and actor Sir Lenny Henry and boxer and Olympic champion Nicola Adams at the Buckingham Palace ceremony.
Tonight marks the fourth annual Young Leaders awards ceremony - a favourite of the Queen, who organised it to pay tribute to extraordinary young people.
David Beckham is among the stars at tonight's Queen's Young Leaders awards
This year’s nominations come from 38 countries across the globe. They have worked on issues ranging from supporting people with mental health problems, access to education, promoting gender equality, food scarcity and climate change.
This year Prince Harry also became a patron of the programme.
He gave a heartfelt speech this evening after being introduced by Sir John Major.
The Duke said: "The issues all of you have chosen to take on are at the core of some of the world's biggest challenges - from tackling stigma around mental health and promoting gender equality, to changing mind-sets and habits in order to conserve our natural world - you are all making a huge difference.
"Your generation is the first that will have to deal hands-on with topics and issues that have been known about for a very long time. You are the future leaders who will need to pick up the baton on issues such as climate change, food security, equality and access to education, and improving the lives of the most vulnerable people in our communities.
"The pace of change is happening so much faster than it did 100 years ago, or even 50 years ago. A more interconnected world means that any local problem can become a global problem overnight, but at the same time the technology and innovation driving this inter-connectivity means that any local solution can become a global solution just as fast.
"In this rapidly changing world, it is heartening to meet so many inspiring young people gathered here today, who have already stepped up as leaders and improved the lives of so many people across the Commonwealth. You are the hope and optimism the world needs and we will all do everything that we can to support you in it.
"One of the best things about The Queen's Young Leaders coming together this week is having the chance to share the projects you've taken on – you are now part of a community of people trying to do good. I encourage you to nurture these new relationships, share your ideas, stay connected and keep working together. What you have achieved individually is formidable, but collectively, the possibilities are limitless.
"This is not the last you will hear from me. Earlier this year, I was honoured to have been named The Queen's Commonwealth Youth Ambassador, and I am committed to supporting the legacy of The Queen's Young Leaders and the 1.4 billion Commonwealth youth.
The Queen looked starstruck as she greeted David Beckham this evening
"I guess you can say you're stuck with me. I, together with my wife Meghan, look forward to convening young people from around The Commonwealth to hear your ideas, work with you to build platforms for you to collaborate and form partnerships, and continue to meet with many of you as we travel around in our work on behalf of The Royal Family. We look forward to meeting many of you this evening - but we also hope to see you in action in your home countries someday too.
"The complete network of Queen's Young Leaders has now been established, forming a powerful group of 240 young people from across 53 Commonwealth countries that will connect, collaborate and change lives together for years to come. I can't wait to see all that you will do to change the world!
"Thank you and good luck."