Kate Middleton and Prince William reportedly attended a lively 50th birthday party thrown by Pippa Middleton for her husband, James Matthews, at their private 145-acre estate in Berkshire. According to The Daily Mail, the event, which took place on September 20, 2025, became a local talking point due to its extravagant nature. The party, centered around James’ passion for motorsports, included a high-flying aerial display featuring a Spitfire—an iconic World War II-era fighter plane—which sparked some concerns among neighbors about the noise, particularly for those with dogs. Music continued late into the night, with reports of thumping sounds lingering until 1:30 a.m.

The party’s guest list included not only Prince William and Kate but also other notable figures, such as former Spice Girl Geri Halliwell-Horner, her husband Christian Horner, and James’ brother Spencer Matthews with his wife Vogue Williams. The celebration was said to have a “racy” theme, tying into James Matthews’ background as a former British racing driver and current board member of Atlassian Williams Racing.

Pippa, 42, and her husband James, an Eton-educated financier, moved to their estate in 2022, which places them near Kate and William’s home at Adelaide Cottage in Windsor. The two sisters are known to share a close bond, with Pippa regularly attending Kate’s Together at Christmas carol service at Westminster Abbey.
While Pippa and James initially expressed a desire to live a quiet life away from the spotlight when they became engaged in 2016, their public appearances have remained occasional. Pippa, along with her family, has made an effort to keep their personal lives private, though they still occasionally attend high-profile events, such as the Formula 1 British Grand Prix in July 2025.

Despite the fun and spirited atmosphere of the event, the noise and spectacle drew mixed reactions from local residents. Some expressed concern about the disruption, while others seemed more resigned to the lively nature of life with wealthy neighbors.

Kate and William’s attendance at the birthday party highlights the closeness between the two sisters, but also the lifestyle contrasts within the royal family. The public’s attention remains divided between the more traditional, public-facing roles of Kate and William, and the quieter, private family life that Pippa and James have chosen to pursue, even as they occasionally step into the limelight for family celebrations or motorsport events.
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