Remember Paris Hilton? She was the socialite everyone was talking about in the early 2000s. Back then, her personal assistant, the person who ran errands and cleaned for her, was a little-known socialite on the rise, Kim Kardashian.
Sigmund Freud came up with innumerable psychological theories and Salvador Dali produced innumerable weird paintings. The two crossed paths in 1937, and Dali sketched a portrait of Freud to mark the occasion.
English actor Eddie Redmayne, who's famous for playing the late physicist Stephen Hawking, attended boarding school with the future King of England, Prince William.
It's hard to imagine any connection between the world of digging through the ditches and burning through the witches with Pee-wee Herman, but back before Zombie's music career, he was a production assistant on Pee-wee's Playhouse.
The two actors were roommates in college. If you've ever wondered why Irving Rhames changed his name to Ving, it was done at Tucci's suggestion.
The late actors, who played Superman and Mrs. Doubtfire respectively, were good friends. Reeve helped Williams out in college and Williams helped Reeve through his paralysis.
It seems like all British celebs know each other, and here's yet another example. Swinton and the future Princess of Wales were classmates at boarding school.
Two eras collided when Billy Crystal, as a child, was babysat by jazz legend Billie Holiday. Crystal credits Holiday as the first person to take him to a movie.
The '60s artist and the Apple founder seemingly came from different worlds, but Jobs actually taught Warhol how to use, and draw with, a Mac.
Much like the Mickey Mouse Club connection between various stars, Lovato and Gomez first met as children when they appeared on Barney and Friends.
It stands to reason that Cher and the Red Hot Chili Peppers frontman would have met at one point or another. Their first meeting was way back in the day though, as Cher used to babysit the young Kiedis.
These guys obviously know each other from their time on The Office, but the connection runs way deeper as they played Little League baseball together in the sixth grade.
This one is perhaps unsurprising as Tyson has repeatedly named Sagan as one of his heroes. But they did meet back when Tyson was applying to Cornell. The meeting, Tyson says, inspired his future path.
Paul Rudd, who doesn't age, and Jon Hamm, who's looked like a 40-year-old since he was 20, dated the same girl in college. Her name was Sarah and she was the sister of one of Rudd's friends.
Pamela Anderson is a big supporter of the Wikileaks founder, defending him on numerous occasions. She's also visited him at the Ecuadorian embassy in London, where he's holed up. The weirdest part? No one's really sure why they're friends.
One is one of the most beloved SNL comedians of all time and the other stars in more serious roles, but Paltrow and Rudolph went to elementary school together.
Lauryn Hill and Zach Braff aren't usually mentioned in the same sentence, but maybe they should be. They were childhood friends and Hill even attended Braff's bar mitzvah.
We associate Michael Bay with plotless, explosion-heavy blockbusters and we associate the late Leonard Nimoy with thoughtful galactic introspection, but the two were actually related by marriage as Bay's cousin married Nimoy.
It's fairly common knowledge that Ray J and Brandy are siblings, but what slides under the radar is that both are first cousins with the Doggfather himself.
