Calvin Klein is celebrating 30 years of underwear dominance. The fashion designer launched its iconic undies in 1982 and quickly changed the game, featuring buff bods poured into form-fitting pairs of skintight trunks.

Mark Wahlberg—when he was Marky Mark—gained serious notoriety as a CK model. Sure, he's gone on to a respectable, Academy Award-nominated career, but he was a CK underwear peddler at one point.

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Kellan Lutz of the 'Twilight' saga also modeled the undies, proving Rob Pattinson and Taylor Lautner ain't the only hunks in that franchise.

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Model Garrett Neff also looked hunktacular in his CK skivvies.

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Actor Djimon Hounsou also showed off his God-like figure by dropping trou for CK!

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[All photos: Calvin Klein]

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