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    1. Celebrity
    2. Royals

    There's a Long-Standing Debate over Princess Kate's Title—a Royal Correspondent Just Cleared It Up

    The great Kate debate.

    Christine Ross's avatar
    By Christine Ross
    Published 28 July 2026 In News

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    Princess Kate Middleton royal title
    (Image credit: Getty Images)
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    A royal correspondent has finally settled a debate that’s been ongoing for over fifteen years. Every social media post and headline news story referring to the Princess of Wales as “Kate Middleton” is fraught with replies correcting Princess Kate’s official title: is it Kate, Catherine, or something else entirely?

    Kate Middleton and Prince William announce their engagement in the State Rooms of St James's Palace on November 16, 2010

    Prince William referred to his then-fiancée as "Kate" in their engagement interview.

    (Image credit: BEN STANSALL/AFP via Getty Images)

    Prince William and Princess Kate during the coronation

    She is now formally known as Catherine, the Princess of Wales.

    (Image credit: Getty Images)

    Channel 5’s royal correspondent Simon Vigar told GB News that palace officials have advised member of the press to refer to the Princess of Wales by her formal birth name, Catherine. Vigar explains that "Kate obviously works in a headline, like Di and Meg.” She has become known as Princess Kate—or, occasionally, even as Kate Middleton—but Vigar reports that in recent years “we were getting briefed that it's 'Catherine'.”

    The great debate over Kate vs. Catherine has been going on for over fifteen years, since Prince William referred to her as “Kate” in their official engagement interview. Since then, the royal couple’s team and the Princess of Wales herself have tried to correct the narrative and shift the name to “Catherine.” On a 2021 royal engagement, Catherine told a young child, "I'm the Duchess of Cambridge, but lots of people call me Catherine." Most recently, the Princess of Wales told children in Italy that her name is “Caterina,” the italian form of Catherine.

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    Prince William and Kate Middleton wedding

    Princess Kate stopped being "Kate Middleton" on her wedding day in 2011.

    (Image credit: Getty Images)

    The Four Wives of Windsor: the Inside Story of Diana, Camilla, Catherine and Meghan – the True Power Behind the Royal Family

    Simon Vigar
    The Four Wives of Windsor: the Inside Story of Diana, Camilla, Catherine and Meghan – the True Power Behind the Royal Family
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    Kate Middleton wearing a red coat and pointing, sitting next to her parents and friends at William's graduation

    Her family has reportedly always called her "Catherine."

    (Image credit: Getty Images)

    Simon Vigor, who has written the upcoming biography The Four Wives of Windsor: The Inside Story of the Power Behind the Crown, reports that she is "definitely Catherine,” adding that her family have “always” called her Catherine. The princess’s family, including her mother Carole Middleton and brother James Middleton, have referred to her as "Catherine" throughout interviews and stories of their childhood.

    So, why can’t she escape her maiden name? An SEO expert explained to Hello that it all comes down to SEO: search engine optimization. "Search behavior is kind of like how people are searching and the underlying intention behind those searches," according to Andrew Coco, senior director of web strategy and SEO at NBCUniversal. Coco explains that "Kate Middleton" sees more searches in search engines over her formal title or her full name, according to Google Trends.

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    Marie Claire Newsletter

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    Christine Ross
    Christine Ross
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    Writer

    Christine Ross is a freelancer writer, royal expert, broadcaster and podcaster. She's worked with news outlets including the BBC, Glamour, Talk TV, ET, PBS, CNN and 20/20 to cover the foremost royal events of the last decade, from Prince George’s birth to the coronation of King Charles III.

    She previously served as co-host of Royally Us, a weekly royal podcast by Us Weekly. As a freelance writer and royal commentator she provides expert commentary, historical context and fashion analysis about royal families worldwide, with an emphasis on the British Royal Family.

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