12 Big-Named Actors Who Guest-Starred on Friends Before They Were Famous

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Today marks a very special occasion, people — it’s the official 20th anniversary of Friends! The public’s been talking about this particular moment for a while now what with the pop-up Central Perk in NYC, but today, September 22, is the physical 20th anniversary of the original air date for the history-making 10-season television series, starring Jennifer Aniston, Courteney Cox, Lisa Kudrow, Matt LeBlanc, Matthew Perry and David Schwimmer.

So, to refresh your memories of all the goodness that came out of arguably the best comedic TV show of all time, here are 12 big-named actors who you probably forgot guest-starred on Friends before they were stars: