11 Longtime Celebrity BFFs

Okay, if any pairing can give Affleck and Damon a run for their money in the most adorable, amazing friends-before-they-were-famous category, it's these guys. The two handsome, funny, talented actors, who have known each other for more than twenty years, used to play Trivial Pursuit together and hang out with Joe Buck (?!) and Adam Scott (!). If time travel is ever invented, its sole purpose will be to check out Paul Rudd and Jon Hamm as youngsters together. [Photo credit: Bruce Glikas/FilmMagic

Before they walked the Oscar red carpet together, longtime buddies Kidman and Watts walked the halls of North Sydney Girls' High School in Australia. The friends supported each others' acting careers from the very beginning and have stayed BFFs since becoming two of the most famous women in Hollywood. [Photo credit: Jeff Vespa/WireImage]

Imagine how hilarious their place must have been. Before becoming comedy stars, O'Brien and Garlin lived together in Chicago in the late '80s (the funny duo revisited their old pad during a segment on Conan) and have stayed chums ever since. In fact, in solidarity of his friend, Garlin said he would not appear on The Tonight Show with Jay Leno after the late night war debacle. [Photo credit: Stephen Shugerman/Getty Images]

Okay, now imagine how hilarious their place must have been. The comedy geniuses got their start when they were roommates in the '60s at NYU. In fact, it was there that Guest and McKean wrote songs for the classic This is Spinal Tap. Thankfully, for movie and comedy fans everywhere, the two have remained friends and collaborators for over 40 years. [Photo credit: Joel Ryan/AP Images]

Okay, now imagine how hilarious (and, let's be honest, probably filthy) this place must have been! Before they made Funny People together, the comedy giants made good roommates in California. Apatow once likened rooming with Sandler to living with "the comfortable naked guy at the gym." It seems that shared appreciation of frat boy humor paid off for the both of the stars, who are still good friends. [Photo credit: Chris Pizzello/AP Photo]

Before he was the Vice President of the United States, Al Gore was the hallmate (and eventual roommate) of Tommy Lee Jones, before he was an Oscar-winning star. The actor and the politician seemed to get along swimmingly at Harvard (no grumpy faces here) because TLJ supported Gore at the 2000 Democratic National Convention. Bonus fun fact: Gore and Jones also befriended fellow Harvard student John Lithgow! [Photo credit: Stephen Lovekin/WireImage]

The beautiful blondes may have played polar opposite rivals in the 1999 teen drama Varsity Blues, but in real life the two were anything but. The actresses met in Italy on a modeling gig and "became instant friends" before they broke out in Hollywood. The two, who roomed together for a time in Los Angeles, have remained great girlfriends since. Larter was a bridesmaid in Smart's wedding in 2011. [Photo credit: Michael Buckner/WireImage]

Williams and Reeve met at the Julliard School and would eventually room together there. Fame never got in the way of the two, who remained close friends until Reeve's death in 2004. (Williams reportedly would cheer Reeve up in the hospital with his trademark off-the-wall humor.) Williams has been an active supporter of the Christopher & Dana Reeve Foundation. [Photo credit: Steve Sands/AP Images]

Before they were Oscar-winning actresses, McDormand and Hunter were randomly paired as roommates at Yale University. The two hit it off, later living together again in an apartment in New York City in the early '80s. The roomies would eventually share the screen in the 1987 cult comedy classic Raising Arizona. [Photo credit: Joe Thomas/Getty Images]

Perhaps the oddest pairing of them all, Douglas and DeVito shared a New York City apartment together in the early '60s while getting their start in the entertainment business. In 2008, the old buddies reminisced about their time living together, when DeVito told the New York Daily News "Michael did the laundry" while Douglas shared "Danny was sloppy." Hopefully he didn't leave any rum ham around. [Photo credit: Peter Kramer/AP Images]