They say you have to remember where you came from, and that friends stay friends forever.
That's not just the case for you and your friends from high school, but also for A-list celebrities. Everyone has to come from somewhere, and you might be surprised that in this giant world, more than a couple stars have known each other since before they could drive!
How many of these celebrity pairs did you know knocked elbows in their awkward youth?
Sean Penn & Robert Downey Jr.
The two major league actors spent their teenage years growing up at Santa Monica High School.
Liv Tyler & Kate Hudson
The stars are two years apart, but I'm sure they must have passed each other in the halls of Santa Monica Crossroads School from time to time.
Anderson Cooper & Christian Slater
Do you think that either one of them knew how famous they were going to be in just a few years?
Nicky Hilton & Lady Gaga
The two women attended the same Catholic school in New York City. Their classmate Paris Hilton unfortunately never graduated.
Rob Lowe & Charlie Sheen
These two have been good friends ever since they were in high school. While Rob always wanted to start acting, Charlie held out hopes for a baseball career!
High school stars include these upcoming iconic duos...
Matt Damon & Ben Affleck
Damon and Affleck have been best friends for years, both achieving stardom in Good Will Hunting, which they co-wrote together.
Neil Diamond & Barbra Streisand
The singers go way back it seems, both graduating from Erasmus Hall High School in Brooklyn, New York.
Zach Braff & Lauryn Hill
Who knew that New Jersey's Columbia High School could produce an amazing singer and such a talented nurse!
Snoop Dog & Cameron Diaz
Probably the most surprising duo on this list! The two went to the same Californian high school and Cameron has said she probably bought pot from Snoop back in the day.