Alyson Lee Hannigan is an American actress. She is best known for her role as Willow Rosenberg on the television series Buffy the Vampire Slayer. She currently plays Lily Aldrin on the CBS sitcom How I Met Your Mother. She also played flautist Michelle Flaherty-Levenstein in three American Pie films.

Born March 24, 1974 her primary personality traits are represented by the Chinese Zodiac elemental animal sign, the Wood Tiger. The adventurous and courageous Tiger is a born leader. She is not afraid to blaze new trails, and, given her independent streak, she is more than willing to go it alone if necessary. Her kinder and gentler side also includes a genuine humanitarian streak. She is empathetic and keenly senses the emotions and feelings of others, to which she responds with compassion and a sincere desire to help when needed. Passion and creativity are the hallmarks of the Wood Tiger. What a great sign for the performing arts or any career that puts Alyson in front of the public where she can use her creative ability and, or, leadership skills. She is the most mellow of Tigers and therefore not so domineering. She tends to be very popular, especially since she is probably charismatic.