Here are nine personal details we learn as the UK’s longest-serving monarch.

Queen Elizabeth with royal family including George

Trooping The Colour in London, England. The ceremony is Queen Elizabeth II's annual Birthday parade. Credit: Photo by Chris Jackson/Getty Images

As a child, the young Princess Elizabeth would play a game called ‘catching happy days’ with her cousin Margaret Rhodes. It involved catching leaves as they fell from trees. Rhodes also reveals that the future Queen was always ‘a very serious little girl’.

In her first-ever solo TV interview as a royal, Duchess Kate notes that Prince George adorably calls his famous great-grandmother ‘Gan-Gan’. And the affection is mutual. Queen Elizabeth always leaves a little gift in their room when Kate and William bring the kids over for a royal visit.

The Queen is at ease when surrounded by her beloved horses. As a child, Elizabeth was given her first horse — a Shetland pony named Peggy — at four, and she still takes her favourites out for a trot at 90.  We watch as an unguarded Queen smiles as she feeds the horses carrots and seems to know much about their individual quirks. Although, in the film, we overhear her say; “I’m rather a fair-weather rider — I don’t like getting cold and wet!”

The Queen has a wry sense of humour. As she and the royal entourage were about to make a grand entrance to a reception of 600 diplomats in the adjoining room she quipped: “Do you think, if we open the door, is there anyone here?”

Royal pillow, It's good to be Queen

Screen grab of pillow spotted at Balmoral Castle.

The Queen vacations at Balmoral in Scotland every year. It’s her favourite place to unwind. Look at this pillow we spotted on her sofa at Balmoral — reportedly a gift from Prince Harry.

When the Royal household prepares for a state dinner, servants begin polishing the 5,000 pieces of silver two months in advance. It takes three days just to set the table, and the Queen personally ensures that everything is in tip-top shape and that the lighting is just perfect.

Married in 1947, the Queen and Duke have the longest royal marriage in history. As revealed in the film, the Duke is a master chef on the BBQ.

The Queen has a royal briefcase called ‘The Red Box.’ It contains all the papers she needs to sign and review each day. She only gets two days off from her royal duties: her birthday and Christmas Day.

Queen elizabeth wearing bright green outfit

Britain's Queen Elizabeth II distributes Maundy money during the Royal Maundy Service at St George's Chapel in Windsor. Credit: RICHARD POHLE/AFP/Getty Image

The Queen is known for wearing bright pastel colours in public. The Countess of Wessex reveals the reason: “When she turns up somewhere, the crowds are 15-deep and somebody wants to be able to say that they saw a bit of the queen’s hat when she went past. She needs to be able to stand out, for people to be able to say, ‘I saw the Queen!’”