How I Met Your Mother Cast: Then and Now

Alyson Hannigan: Then

Hannigan had an impressive resume before her Lily Aldrin days. The actress played sidekick Willow Rosenberg in television's Buffy the Vampire Slayer from 1997-2003 and took on marching band nerd Michelle Flaherty in 1999's American Pie.


Inside Us Weekly

comments powered by Disqus