To celebrate, stars Josh Radnor, Alyson Hannigan and Neil Patrick Harris, as well as series co-creator Craig Thomas, spoke with PEOPLE about the "special" episode that started it all "You never know ...
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Why Hannigan couldn't stand kissing Segel on HIMYM
Find out the surprising reason Alyson Hannigan dreaded her on-screen kisses with Jason Segel on How I Met Your Mother.
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