If there’s anything the average adolescent knows all too well about, it’s the banes (and blessings) of having a roommate.

While celebrities like Raven-Symonè and Justin Long have lamented their strange roommate scenarios, stars like Ben Affleck and Ali Larter grew to enjoy living under the same roof as their now-famous friends.

In the spirit of graduation season (hallelujah!), here are 15 celebrity duos you probably didn’t know once shared living spaces before their careers took off.

Check out our gallery, above, to discover which celebrity pairs were roommates in a previous life.

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