The CBS smash hit comedy premiered on Sept. 19, 2005 and ran for nine seasons until March 31, 2014. The series has won seven Emmy Awards, five People's Choice Awards, and racked up several other nominations. See stars Josh Radnor, Jason Segel, Cobie Smulders, Neil Patrick Harris, Alyson Hannigan and others 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.