12 of the most eligible millionaires and billionaires in the world

Age: 23
Country: Norway
Estimated net worth: $1.48 billion

At 23 years old, Katharina Andresen is the second-youngest billionaire in the world. An heir to her family's investment company, Ferd, based in Oslo, Norway, Andresen and her younger sister each inherited 42 percent of the company. (Their father still runs the company.) Katharina currently works as an intern at Ernst & Young.

Age: 26
Country: UK
Estimated net worth: $280 million

India Rose James is an heiress to publishing and real estate tycoon Paul Raymond, who was her grandfather, according to Wealth-X, a research firm that studies the wealthy. She founded the Soho Revue, a contemporary art gallery in London, that has since closed. James sports a unique, alternative look, and can often be seen with pink hair.

She has a 1-year-old daughter and recently split from Hugh Harris, guitarist for English rock band The Kooks.

Age: 26
Country: US (Originally UK)
Estimated net worth: $45 million, according to Wealth-X

Perhaps best known for being a member of pop band One Direction, Louis William Tomlinson has since begun his own solo singer-songwriter career. Tomlinson, who grew up in South Yorkshire, England, auditioned for the reality show X Factor in 2010.

In 2014, the musician showed how much his roots matter to him when he bought his hometown soccer team, The Doncaster Rovers. Tomlinson recently put his Calabasas, California, home on the market for nearly $14 million.

Age: 28
Country: UK
Estimated net worth: $35 million, according to Wealth-X

Emma Watson is philanthropist, activist and model, but is perhaps best known for her roles as Hermione in the "Harry Potter" films and as Belle in 2017’s rendition of "Beauty and the Beast."

Watson, who was born in Paris, grew up in Oxfordshire, England, and later lived in the U.S. while attending college at Brown University. Watson is also a U.N. ambassador. Where she currently resides is unknown, as she maintains a fairly private personal life.

Age: 27
Country: US (originally Ireland)
Estimated net worth: $1 billion

Collison, the youngest self-made billionaire in the world, dropped out of Harvard at 19 to co-found Stripe, a payment-processing company used by the likes Facebook and Lyft, as previously reported by Business Insider.

Originally from the small village of Dromineer, Ireland, Collison founded the company with his brother, Patrick. Collison now resides in San Francisco, where Stripe is headquartered. The adventurous billionaire enjoys flying (he’s a licensed pilot), hiking and running.

Age: 28
Country: US
Estimated net worth: $280 million

The pop megastar hardly needs an introduction — her steady climb to fame over the last 10 years has been heavily documented. Her recent album, “Reputation,” sold over 1.2 million copies in its first week, and went on to become the best-selling album of 2017 in the U.S.

Swift was included in TIME’s Person of the Yearlist in 2017 as one of the country’s silence breakers. Paparazzi photos have suggestedthe singer is dating actor Joe Alwyn, but nothing has been confirmed.

Age: 29
Country: US (originally Ireland)
Estimated net worth: $1 billion

Patrick Collison, John Collison’s brother and the co-founder and CEO of Stripe, is also one of the world’s youngest self-made billionaires. Patrick attended the Massachusetts Institute of Technology for a bit before dropping out. He currently resides in San Francisco.

The Collison brothers' wealth isn't anything new; Patrick and John Collison actually became millionaires in 2008 — long before Stripe — when they sold Auctomatic, an online marketplace they had founded, Forbes reports.

Age: 31
Country: US
Estimated net worth: $360 million

Apoorva Mehta is the founder and CEO of Instacart, a grocery delivery service he founded in 2012. Persistence is a virtue, and Mehta has it: he founded around 20 companies before he saw success with Instacart.

The San Francisco resident enjoys biking and reading, and has grown his company to have hundreds of employees.

Lukas Walton
Age: 32
Country: US
Estimated net worth: $14.5 billion

Lukas Walton is the grandson of Wal-Mart founder Sam Walton, and therefore an heir to the megastore’s fortune. Walton appears to live a fairly down-to-earth life and stays out of the public eye.

In fact, he was raised in National City, California, a town with a median household income of about $45,000. Walton graduated from Colorado College and currently resides in Jackson, Wyoming.

Drew Houston
Age: 35
Country: US
Estimated net worth: $3.4 billion

Drew Houston, the CEO and founder of Dropbox, created his file-sharing company with a fellow Massachusetts Institute of Technology classmate in 2007 at just 24 years old, Forbes reports. The company has since grown significantly and went public in March 2018.

Houston is also a philanthropist and backer for FWD.us, a group that promotes immigration reform, alongside the likes of Bill Gates and Mark Zuckerberg. The billionaire currently lives in San Francisco.

Age: 41
Country: Japan
Estimated net worth: $1.12 billion

One of the few self-made billionaires on this list, Yoshikazu Tanaka grew his wealth by founding the company GREE, Inc., which develops social-network-based games.

Tanaka currently serves as the company's president and chairman. Fun fact? Tanaka, who was born in Tokyo, was addicted to playing Nintendo videogames as a child.

Age: 44
Country: US
Estimated net worth: $47.3 billion

The co-founder of Google, Sergey Brin currently serves as the president of Alphabet, Google’s parent company. Brin was born in Russia, and moved to the U.S. with his parents at a young age.

After college at the University of Maryland at College Park, Brin pursued a Ph.D. in computer science at Stanford University, where he joined forces with Google co-founder Larry Page. Brin was married to 23andMe co-founder Anne Wojcicki from 2007 to 2015, and the couple has two children. He's an active philanthropist, too: Brin has donated over $100 million to Parkinson’s disease research.