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Grand Duchess Stephanie 'leads with grace' in flowing gown for her big royal debut


Grand Duchess Stephanie of Luxembourg's first outfit as monarch for her ascension on Friday, 3 October was resplendent


Luxembourg's Grand Duke Guillaume (R) and Grand Duchess Stephanie stand at the start of their swearing-in ceremony as Grand Duke and Duchess at the Chamber of Deputies in Luxembourg city on October 3, 2025. Luxembourg will enthrone a new sovereign today with Prince Guillaume set to succeed his father, Grand Duke Henri, who officially abdicates on the same day, ending a 25-year reign. (Photo by NICOLAS TUCAT / AFP) (Photo by NICOLAS TUCAT/AFP via Getty Images)          © AFP via Getty Images
Josh Osman
Josh OsmanJunior Lifestyle Writer
October 3, 2025
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On Friday, Prince Guillaume of Luxembourg succeeded his father, Grand Duke Henri of Luxembourg, on the throne, marking the European state's first change to the monarchy in 25 years. For the new Grand Duke and his wife, the future Grand Duchess, Stéphanie de Lannoy, looking regal was vital. Style is arguably one one of the most significant symbols for an ascending royal to make an impression, and Grand Duchess Stephanie certainly surpassed the high expectations, bringing out multiple magnificent outfits for the day. Scroll down to see our breakdown of the new Grand Duchess' looks for the monumental day…

Princess Stephanie wowed in a lilac caped tulle gown© Getty Images

Stéphanie wore the most incredible lilac tulle dress, with a beautiful pattern across the bodice and regal, cape-like sleeves that draped so elegantly over the shoulder. For the sake of the occasion, she kept the accessories mostly minimal, but the pair of diamond drop earrings she brought out glistened – it goes without saying that the 41-year-old looked absolutely dazzling.

Princess Stephanie looked incredible© WireImage

According to fashion stylist Constance Richardson, the choice of dress is an especially poignant one for the Grand Duchess. She says: "In a setting dominated by military dress and gold interiors, her dress creates immediate contrast: where the men’s uniforms project authority and tradition, her soft pastel conveys serenity and approachability." In her first outfit as Grand Duchess, the new monarch has struck a balance between regal elegance and a down-to-earth appearance.

Grand Duke Guillaume and Grand Duchess Stephanie during their swearing-in ceremony© Getty

The style expert doubles down on the significance of colour, especially lilac as opposed to other similar shades. Constance notes that it "blends the calm of blue with the regal strength of purple. By wearing it, she bridges the gap between regal and relatable". She further adds that it's a brilliant symbol of the royal family's modern, forward-facing approach: "It's a gentle but deliberate signal of her role as a new-generation Grand Duchess, who leads with grace and approachability rather than just formality."

Luxembourg's Grand Duke Guillaume and Duchess Stephanie wave from the balcony of the Grand Ducal Palace© Getty

Beyond the colour, the silhouette of the gorgeous dress "reinforces the message", she says. "It's light and flowy against the more rigid lines of her surroundings. This is the quiet power of colour in royal wardrobes: Stéphanie’s look doesn’t need to be bright or rigid to make a statement. Its softness is what sets her apart as a modern royal image framed in approachability and confidence."

Grand Duke Guillaume  and Duchess Stephanie wave to the crowd as they arrive for a solemn session in front of the City Hall © Getty

Later in the day, Grand Duchess Stéphanie switched outfits. Opting for an equally elegant look with an off-the-shoulder bridal white gown, she kept the jewellery minimal and let the dress, with a bright colour and beautiful silhouette, speak for itself.

The ascension to the throne

On Friday, 3 October, Grand Duke Henri of Luxembourg officially abdicated, allowing his son, the new Grand Duke Guillaume and his wife, Grand Duchess Stéphanie to take the throne. For the momentous occasion, the Belgian and Dutch royal families were also present, including Queens Mathilde and Maxima, as well as their daughters.

Grand Duke Guillaume delivers his first speech as head of state © Getty
Grand Duke Guillaume also delievred his first speech as head of state

For the swearing-in ceremony, Grand Duke Guillaume was sitting on a throne from a series commissioned for the Great Hall of Knights of the former Berg Castle, which was built in the neo-Gothic style in the mid-1850s. Before this date, it was used by Grand Duchess Charlotte for major occasions during her reign, and later by Grand Duke Jean for his swearing-in on 12 November 1964. On this occasion, the throne was restored and branded with the monogram of the future Grand Duke Guillaume.

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