She is the shy computer nerd in “Buffy the Vampire Slayer” first six seasons run from the year 1997 to 2002. Though, her role was later changed into the lovely redhead witch who uses her magic to alter the world. The woman behind the cast Willow Rosenberg is none other than Alyson Hannigan. Born under the name Alyson Lee Hannigan, she is an actress with somewhat unusual beauty and exceptional acting style. Unlike Willow she didn't need magic to make herself famous.