Alyson Hannigan was born in Washington, D.C. to Emilie (Posner), a real estate agent, and Al Hannigan, a truck driver. She began her
acting career in Atlanta at the young age of 4 in commercials sponsoring such companies as McDonald's, Six Flags, and Oreos. She is a
seasoned television actress, guest starring in Picket Fences: Tatort Gartenzaun (1992), Roseanne (1988), Ein Hauch von Himmel (1994) and the Alle meine Kinder (1991) before starring in her most notorious roles in Buffy - Im Bann der Dämonen (1997) as "Willow Rosenberg" and How I Met Your Mother (2005) as "Lily Aldrin."