Mark Zuckerberg & Priscilla Chan

When Mark Zuckerberg and Priscilla Chan got married, they spent almost no money on it. The two opted for a small wedding in the backyard of Zuckerberg's property. The couple doesn't like to spend money on fancy dinners. They are often seen strolling into a Burger King or McDonald's. Even billionaires like to save money on the dollar menu now and then.
Jennifer Lawrence

Coming from a middle-class family, the multimillionaire still hunts for bargains at the supermarket, collects coupons, proudly drives a Volkswagen, and avoids valet parking to save money. “I was raised to value money, to respect money, even if you have a lot of money,” she once told “Fabulous,” a publication of the British newspaper “The Sun.”
Prince William and Kate Middleton

The first thing people think of when it comes to royalty is money and a luxurious lifestyle. Prince William himself has a high net worth, but not as high as you might imagine, $40 million. Even Kate's net worth is only in the $1 million range. Kate has earned money from appearances since marrying William, but not a ridiculous amount.
The royal couple is opting to save money and give a break to those who wish to serve them. Kate will wear the same outfit twice (unlike most of the royals), and neither of them pays anyone to go grocery shopping for them. Kate and her son George will walk the streets of England with grocery bags in tow.
Sir Paul McCartney

The rock music legend reportedly sent four of his five children to public schools instead of private schools, whose expensive tuition he could easily afford. It never did his daughter, Stella, any harm; she has since emerged as a famous fashion designer. As the man once wrote, "I don't care much about money / money can't buy love for me," and apparently, it's not necessary to get a decent education.