Kylie Jenner was 21 years old when Forbes officially declared her the world's youngest self-made billionaire in March 2019, primarily from her Kylie Cosmetics empire, though her billionaire status was later disputed and revised by the magazine in 2020 due to questionable financial claims from her team.
In 2019, the magazine estimated Jenner's net worth at US$1 billion and called her the world's youngest self-made billionaire at age 21, but it turned out to be false, as Forbes revealed that Jenner and her team had deceptively forged tax-returns to create an image she was a billionaire.
One explanation: Kylie's business quietly fell by more than half in a single year. If so, Coty paid up for a “high-growth” brand that is actually a much smaller business than it was just a few years ago.
As of late 2025, Shayne Coplan, the 27-year-old founder of the prediction market platform Polymarket, became the world's youngest self-made billionaire after a major investment from the NYSE's parent company, Intercontinental Exchange (ICE), valuing his stake at over $1 billion. Another prominent young figure is YouTuber MrBeast (Jimmy Donaldson), also 27, who is considered the only self-made billionaire under 30 (not inheriting wealth) through his content empire, though his personal cash flow differs from his company's valuation.
Alexandr Wang—who became the world's youngest self-made billionaire at 24—is now, at 28, running one of the most ambitious AI efforts in Silicon Valley.
Kylie Jenner has publicly shared that she deals with chronic back pain since her second pregnancy, leading her to undergo stem cell therapy, and has also discussed struggles with anxiety, while a past health scare involved a diagnosis of recurrent corneal erosion syndrome (an eye condition) and possibly an incidental brain aneurysm found on a scan, though she focuses on managing the pain and mental health.
The "first richest kid" isn't a single historical figure, but Princess Charlotte of Wales is often cited as the current richest child due to massive inherited wealth from the British Crown, while early child actor Jackie Coogan holds the Guinness World Record for the youngest non-inherited millionaire, becoming a millionaire by age 13 in the 1920s from movie earnings. Different lists focus on inherited fortunes (royalty, heirs) or self-made wealth (entrepreneurs, social media stars).
Yes, Taylor Swift is officially a billionaire, a status she achieved in October 2023, with her net worth estimated by Forbes and Bloomberg at around $1.6 to over $2 billion, largely thanks to her record-breaking Eras Tour, music catalog, royalties, and real estate investments. She is one of a handful of musicians to reach billionaire status, joining others like Rihanna and Jay-Z.
Kylie Jenner becomes world's youngest billionaire; Mukesh Ambani is 13th richest.
Despite her dramatic transformation, Kylie Jenner has irrefutably denied rumors that she's had her entire face changed. "People think I fully went under the knife and completely reconstructed my face, which is completely false," she told PAPER.
Kendall Jenner, Reality TV Star
In a four-part interview with Vogue published in 2021, Kendall Jenner spoke openly about what it's like to live with anxiety. “I remember being really young and having shortness of breath and going to my mom and telling her,” said Jenner.
Rob Kardashian: $10 million (£7.6m)
Like the rest of his family, Rob, who graduated from business school in 2009, has grown his fortune through numerous savvy side hustles. These include modelling, working as a talent manager, and even launching his own sock line called Arthur George.
Elon Musk, World's Richest Man, Nears $800B Net Worth, Trillionaire Status. Elon Musk, the richest man in the world, has pushed the boundaries of personal wealth and net worth.