Described by Holly as more of a “friend rather than sister,” Kelly’s influence extends far beyond sibling loyalty . From co-authoring a successful book series to managing Holly’s lifestyle brand, Kelly is the strategic mind helping to build a multi-million-pound empire. This is the story of the rarely-seen woman behind the star—a tale of sisterhood, shared creativity, and quiet ambition.
The Inseparable Bond of Childhood
To understand the dynamic between Holly and Kelly, one must look back to their childhood in West Sussex. Growing up, the two were inseparable, laying the foundation for a relationship that would withstand the pressures of fame and adulthood. Rather than the stereotypical rivalry often seen between siblings close in age, the Willoughby sisters cultivated a deep friendship defined by protection and admiration .
Kelly, being the elder, naturally assumed the role of guardian. Holly recalls a poignant memory from their junior school days that perfectly encapsulates their relationship. Holly famously despised school lunches to the point of anxiety. Aware of this, Kelly would deliberately detour past her younger sister’s table on her way back to class, quietly picking up Holly’s uneaten plate to dispose of it, saving her from the torment of being forced to finish the meal. It was a small act of kindness that spoke volumes about Kelly’s protective nature .
While Holly was the artistic, drama-loving blonde, Kelly was the disciplined, academic brunette—the “chalk and cheese” contrast that somehow created a perfect harmony . Kelly’s love for English and storytelling would later become the cornerstone of their professional partnership. Their imaginary games often saw Kelly playing the “postman” while Holly embodied “all the characters coming into the shop,” a childhood pastime that unknowingly rehearsed their future roles as writer and performer .
From Proud Sister to Business Partner
As they transitioned into adulthood, their paths diverged professionally but remained intertwined personally. When Kelly left for university in Exeter, it marked the first significant period of separation for the pair. It was also the moment Holly’s career skyrocketed. Almost overnight, Holly was appearing on the covers of national magazines. Far from feeling envious, Kelly recalls feeling an overwhelming sense of pride, showing everyone on campus her younger sister’s covers .
After university, the sisters reunited in London, buying a property together in Putney. Despite the potential for conflict that often comes with sharing a living space, their dynamic remained harmonious. Holly took on the role of the hostess, cooking for friends, while Kelly excelled at organization and tidying up—a microcosm of their larger life balance . It was during this time that Kelly began working in TV production, placing her behind the scenes in the same industry where Holly was becoming a star in front of the camera .
This balance of creative chaos and organizational structure eventually evolved into a formal business partnership. While Holly is the face of their joint ventures, Kelly is the engine room. Most notably, Kelly serves as the Managing Director of Wylde Moon, Holly’s wellness brand launched in September 2021 .
Wylde Moon is more than just a celebrity endorsement platform; it is a carefully curated lifestyle brand where Holly shares her beauty and fashion favorites, complemented by a podcast featuring famous friends. As Managing Director, Kelly is responsible for overseeing the strategic direction of the brand, ensuring it remains authentic to Holly’s vision while operating as a viable commercial entity.
Reports have highlighted that Kelly is effectively “one half of the brains behind Holly’s £12 million fortune,” underscoring her vital role in growing the family’s financial portfolio . The sisters have been spotted together at glamorous brand events, including the launch of a Wylde Moon perfume at the London Coliseum, presenting a united front in the competitive world of celebrity entrepreneurship .
The Literary Duo: The School for Stars Series
While Wylde Moon represents their current focus, the true testament to the Willoughby sisters’ creative synergy is their “School for Stars” book series. Long before the wellness brand, Holly and Kelly were simply two sisters who loved making up stories. That childhood pastime found its ultimate expression in this seven-book series, which they co-authored together .
Published over several years, the series follows the adventures of twin sisters Molly and Maria Fitzfoster and their friend Pippa as they navigate the trials and triumphs of a prestigious performing arts school. Often likened to a modern-day Enid Blyton’s Mallory Towers, the books captured the essence of friendship, ambition, and creativity that defined the sisters’ own childhood .
Writing a book series is a notoriously difficult endeavor, requiring immense patience, collaboration, and compromise. For Kelly and Holly, it was a labor of love. Speaking about the project years ago, Kelly shared a sentiment that reveals her grounded perspective: “We used to make up stories all the time, so when the time was right we started writing books together. We’re on our fourth now. If we never even sold one copy, how nice for our kids that there’s four books sitting on the bookshelf that their mums wrote. We’re so lucky. You can’t choose your family” .
The writing process highlighted their complementary personalities once again. While Holly brought the dramatic flair and understanding of the performance world, Kelly likely brought the organizational discipline required to meet deadlines and structure narratives. The series became a family heirloom as much as a commercial product, a physical manifestation of their bond that their children could hold and treasure.
A Return to Roots: Championing Literacy
Despite her behind-the-scenes persona, Kelly has occasionally stepped into the public eye for causes close to her heart, particularly the importance of children’s literacy. In 2017, Kelly visited her alma mater, Burgess Hill Girls School in Sussex, a school she attended alongside Holly and where her own daughter later became a pupil .
Her visit was not about celebrity, but about spreading the gospel of reading. Kelly spoke passionately to parents and children about the fundamental role that stories play in development. She emphasized that “it all starts at home” and advocated for reading to children from the youngest possible age. “Children are never too young to be read to, even when they don’t understand what you’re reading,” she said, adding that “15 to 20 minutes of snuggle time spent with your child after a busy day is so important” .
Kelly credited her own mother for instilling this love of literature in both her and Holly, noting that they were “real bookworms” who devoured the works of Enid Blyton . For Kelly, reading is more than an educational tool; it is a bonding mechanism. She believes that discussing books can open lines of communication between parent and child, leading to conversations about deeper issues that might be bothering them.
This advocacy work reveals the depth of Kelly’s character—a woman who uses her platform, however modestly, to champion nurturing family connections through the power of storytelling.
Life Beyond the Spotlight: Family and Marriage
Away from the book tours and brand events, Kelly’s world revolves around her family in West Sussex. For years, she and Holly lived just down the road from each other in the county where they grew up, allowing for the kind of spontaneous visits that define their relationship. Although Holly has since relocated to West London, their proximity remains a priority, and they maintain their close connection through constant communication .
Kelly has been married to her husband, David Foster, since 2010. The couple celebrated their 12th anniversary with sweet social media tributes, with Kelly sharing a candid selfie and later a photo of skywriting that formed an “X” in the sky, which she captioned “Anniversary kisses in the sky” . Together, they have a daughter, Lola, born in October 2012 .
Motherhood has only deepened Kelly’s bond with her sister. Both being mothers has given them a new shared language and experience. Kelly once remarked that despite their busy lives, she used to see Holly every day when they were neighbors, with Holly often popping over unannounced for a cup of tea .
In many ways, Kelly lives the life that Holly—amidst the pressures of prime-time television, public scrutiny, and the recent turmoil surrounding her departure from This Morning—might occasionally crave. She has the stability of a long-term marriage, the joy of raising her daughter away from the paparazzi, and the satisfaction of a successful career that allows her to be creative without being a public spectacle.
Conclusion: The Power of the Quiet Partner
In a world obsessed with fame, Kelly Willoughby represents a different kind of success story. She is the woman who turned down the spotlight to instead stand firmly behind her sister, not in her shadow, but as an equal partner. Her story is a powerful reminder that influence isn’t always measured by Instagram followers or tabloid covers.
As the Managing Director of Wylde Moon and the co-creator of the School for Stars book series, Kelly has proven herself to be a savvy businesswoman and a talented writer. Yet, her greatest achievement might be the family she has built and the unshakeable sisterhood she maintains. Her emotional birthday tribute to Holly perhaps sums up her role best: “Everyone needs a Holly in their life! She’s the fun at a party, the daft when you’re behaving like children, then serious when you really need it, the support when you can’t see the wood for the trees, and the love….always” .
For every star standing on stage, there is often someone in the wings ensuring the show goes on. For Holly Willoughby, that someone will always be her sister, Kelly
