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Famous Fraternity Brothers & Sorority Sisters

16 of 19

Sigma Nu

The Sigma Nu fraternity was founded by Confederate Army soldier James Frank Hopkins at the Virginia Military Institute in 1869 and currently boasts over 20,000 members worldwide, including some of Hollywood's biggest talents.

"Mad Men" star Jon Hamm picked up his membership while studying at the University of Texas. Harrison Ford was initiated into the Ripon College chapter in the 1960s and Paul Rudd officially became a Sigma Nu brother while at the University of Kansas. —XFINITY Entertainment Staff (Photos by Getty Images)

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