Kate Middleton Sparkles With Queen Mother's Tiara At Buckingham Palace's State Banquet

Kate Middleton turned heads when she arrived at a state banquet wearing a headpiece she had never worn before.

The Princess of Wales wore a white Jenny Packham dress with gold embellishments when she arrived for the diplomatic reception held in honor of the arrival of Yoon Suk Yeol, the president of the Republic of Korea, and Kim Keon Hee, the country's first lady, at Buckingham Palace Tuesday evening. She opted to wear the Queen Mother's Strathmore Rose tiara, which hadn't been seen for nine decades. She accessorized with a pair of earrings from the late monarch, Queen Elizabeth's collection, white opera gloves and a silver clutch.

Middleton also wore the Royal Family Order and her Grand Cross of the Royal Victorian Order sash and star, People reported. Meanwhile, Prince William looked dapper in his black suit.

Middleton's choice of outfit and overall appearance at the event received a thumbs-up from netizens. Many praised her on social media, especially her choice of tiara.

"Is this the best the Princess of Wales has ever looked? Catherine at the Korean State Banquet this evening is every inch a Princess," one tweeted along with photos of Middleton from the state banquet. Another commented, "Stunning and how good does the tiara look?!? [O]ne of my favorites and finally worn again."

"She looks like a goddess. Wise move with Strathmore Rose tiara...Catherine wearing [a] historic piece of jewelry," a third user wrote, praising her choice of headpiece with clapping hands emojis. ​​

"IMO, YES!! I've never seen her looking more regal! Full disclosure: While there is no color that is not flattering to the Princess, I'm always particularly stunned by the way she looks in whites and creams," a fan of the future queen consort wrote.

The Strathmore Rose tiara had not been worn by a royal woman since the 1930s. Queen Mother received the item from her father, Lord Strathmore, before she married the Duke of York, Prince Albert, in 1923.

The rarely seen headpiece was designed to look like a garland of wild roses and can be worn either over the forehead, placed upon the hair, or dismantled to form five individual brooches, Vogue reported.

According to Sir Hugh Roberts of The Queen's Diamonds, the jewel "reflects the naturalistic style of head ornaments popular from the mid-19th century onwards." Queen Elizabeth inherited the item in 2002 upon Queen Mother's death.

Meanwhile, Middleton made headlines earlier in the day after the public got a glimpse of her "killer legs." She was photographed as she got out of a vehicle, exposing her legs, which many said were to die for.