Sixteen years before Mark Harmon became the second-ever Sexiest Man Alive, the "St. Elsewhere" star was a senior in 1970 at Harvard High School in North Hollywood, Calif. Watch "25 Years of Sexy: ... more 
Sixteen years before Mark Harmon became the second-ever Sexiest Man Alive, the "St. Elsewhere" star was a senior in 1970 at Harvard High School in North Hollywood, Calif. Watch "25 Years of Sexy: People Magazine's Sexiest Man Alive!" here less 
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Good Morning America | Photo By Seth Poppel/Yearbook Library
Thu, Oct 13, 2011 10:07 AM EDT