“The first rule of Fight Club is: You do not talk about Fight Club!”

Too late — we can't help but break the fundamental rule and travel back in time to celebrate this classic film!

RELATED: See the Cast of 'One Tree Hill' — Then and Now!

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The iconic 1999 movie is still quoted by fans everywhere — and who can forget the stellar performances by Brad Pitt and Edward Norton? We sure can’t!

In honor of this great movie, check out our gallery to see what the stars looked like then vs. now!