Gliding into the courtyard in a chauffeurdriven car, the nature-loving royal gazed approvingly at the colourful wildflower meadow at the front of the historic palace in south-west London.
And waiting to welcome her were some of the most famous names in literature, who were ready to entertain her and the packed audience through the world of books.
HELLO! was there too, and as Her Majesty emerged in a wide-legged navy Anna Valentine jumpsuit to join a champagne reception, she mingled with literary stars including Rebus creator Sir Ian Rankin, Shetland and Vera author Ann Cleeves, historical novelist Kate Mosse and thriller writer Harlan Coben, together with classicist Dame Mary Beard and actresses Helena Bonham Carter and Patricia Hodge.
The Queen, who was accompanied by her son, food critic Tom Parker Bowles, also chatted to the King's cousin, Lady Sarah Chatto, who came with her husband Daniel and their sons, Samuel, 27, and Arthur, 25.
But it was while she was talking to Lee Child, author of the Jack Reacher thrillers, that she gave an update on a matter on everyone's minds: her husband the King's health.
MISBEHAVING HUSBANDS
In a candid conversation with the novelist, Her Majesty said the 75-year-old monarch - who was diagnosed with an undisclosed form of cancer in February and has returned to public-facing duties while undergoing treatment - is "doing fine" but "won't slow down and won't do what he's told".
The best-selling writer replied: "Sounds to me like a typical husband." Afterwards, Lee said: "I asked her how the King is because when I got my CBE, he did my investiture, so I have a soft spot for him and I said: 'I hope he's doing well."
Esta historia es de la edición June 24, 2024 de HELLO! UK.
Comience su prueba gratuita de Magzter GOLD de 7 días para acceder a miles de historias premium seleccionadas y a más de 9,000 revistas y periódicos.
Ya eres suscriptor ? Conectar
Esta historia es de la edición June 24, 2024 de HELLO! UK.
Comience su prueba gratuita de Magzter GOLD de 7 días para acceder a miles de historias premium seleccionadas y a más de 9,000 revistas y periódicos.
Ya eres suscriptor? Conectar
AS SHE SIGNS UP FOR SECOND SERIES OF 'RIVALS' THE TIME OF HER LIFE VICTORIA SMURFIT ON HER DREAM ROLE, HER INSPIRING KIDS AND TRUE LOVE AT 50
Dancing around the studio to the 1980s soundtrack that's providing the background music for this exclusive HELLO! photoshoot, Victoria Smurfit looks to be having the time of her life.
AFTER CELEBRATING THE REOPENING OF NOTRE-DAME STEPPING ON TO THE WORLD STAGE THE PRINCE OF WALES WINS PRAISE FROM PRESIDENT-ELECT DONALD TRUMP IN PARIS
Proving his mettle as a global figure, the Prince of Wales met US President-elect Donald Trump on a visit to Paris last week.
Young at heart
The Duke of Sussex embraced turning 40 as he and Meghan focused on doing good
'OPPENHEIMER' STAR EMILY BLUNT KEEPING IT IN THE FAMILY THE ACTRESS ON WORKING WITH HUSBAND JOHN KRASINSKI AND WHY THEIR KIDS WON'T WATCH HER FILMS
Emily Blunt may be an A-list actress to the rest of the world, but at home with her two young daughters, she's just mum.
MARKING FOUR DECADES OF THE FESTIVE HIT SINGLE LIFE AFTER 'LAST CHRISTMAS' ANDREW RIDGELEY OPENS UP ABOUT GEORGE MICHAEL
With its familiar refrain and heartfelt vocals, Last Christmas by Wham! is as synonymous with the festive season as turkey and mince pies. The song has just turned 40, and to mark the occasion, the band's Andrew Ridgeley is starring in a BBC documentary about the classic tune.
Leading the way
The Prince of Wales has stepped up to the plate amid a year of serious challenges for his family
Pillar of strength
The Queen has been a constant support for her beloved husband throughout a tough year
Welcome return
Royal fans were thrilled to see Kate, elegant as ever, back in the spotlight alongside her family
Her greatest challenge
The Princess of Wales faced her most difficult year with stoicism and consideration for her young family
Bouncing back
Treatment for cancer couldn't keep the King down, as he greeted royal fans from Ascot to Australia