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NEW YORK (KSDK) – If you were an adolescent female during the early 2000s, you probably had a thing for Josh Hartnett. After all, his roles in classics (?) like "Pearl Harbor" and "40 Days and 40 Nights" were pretty swoon-worthy.

A cursory glance at his IMDB profile shows he's been working actively since his glory days, but his role in the TV series Penny Dreadful should once again learn him a place on various "Sexiest Men Alive" lists.

Find out what Hartnett's been doing with his life tonight on the Tonight Show Starring Jimmy Fallon right after NewsChannel 5 at 10 p.m. He'll be joined by fellow 2000s icon Charlize Theron and the Roots.

In the meantime, look at this photo gallery of Josh's glory days:

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