Hairstyles: Alyson Hannigan Long Length Celebrity Hairstyles

In 2005, Hannigan returned to starring in a regular television series, appearing in the hit comedy, How I Met Your Mother, as Lily, and also playing a recurring guest role on Veronica Mars as Trina Echolls.

In February 2006, Hannigan starred as Julia Jones in Date Movie, a parody on romantic comedies.