Queen Elizabeth II
Queen Elizabeth II is seen at the Chichester Theatre while visiting West Sussex on Nov. 30, 2017, in Chichester, United Kingdom. Getty Images/Stuart C. Wilson

Queen Elizabeth II reportedly has a unique way of referring to her clothes, and she doesn’t just call them outfits.

In the Channel 5 documentary “Secrets of the Royal Dressmakers,” former royal butler Paul Burrell said that Her Majesty calls her clothes costumes.

“Which costume will I wear today? [she may say]. She’s dressing up and going out onto the royal stage to perform her duty,” he said.

In the documentary, designer David Emanuel, who designed Princess Diana’s wedding dress, explained the Queen’s looks during her royal outings. He said that the Queen usually bring her kit with her that’s packed with her working clothes.

“She can out-dazzle everybody with her diamonds, hello, and there’s a lot of them! I think she sees it as her working wardrobe,” he said.

The monarch is also known for choosing her clothes based on the engagements that she would attend. In 1983, the Queen visited the 20th Century Fox film studios in Los Angeles. At that time, Her Majesty wore a gown emblazoned with the California poppy.

In 2011, the Queen made a state visit to Ireland. While there, she attended a state dinner and wore a shamrock that had been embroidered into her gown. The bodice and sleeves of her gown were also embellished with more than 2,000 hand-sewn shamrocks. On her left shoulder, the Queen sported a Swarovski Celtic harp brooch.

A royal commentator said that the Queen had the shamrock embroidered on her gown because her engagement was all about business. The monarch doesn’t normally wear clothes out of pleasure because they hold important meanings.

In related news, Her Majesty also made headlines recently after she was photographed during her first meeting with her eighth great-grandchild Archie Harrison Mountbatten-Windsor. The Queen was smiling from ear to ear in the photo while accompanied by her 97-year-old husband Prince Philip.

For the occasion, Her Majesty opted to wear a blue coat over her floral printed skirt.