Alyson Lee Hannigan (born March 24, 1974) is an American actress. She is known for her roles as Willow Rosenberg on the cult classic television series Buffy the Vampire Slayer, Michelle Flaherty in three American Pie films and Lily Aldrin on the CBS sitcom How I Met Your Mother. Hannigan has dated Ginger Fish of Marilyn Manson. She married actor Alexis Denisof at Two Bunch Palms Resort in Desert Hot Springs, California on October 11, 2003. (Denisof played Wesley Wyndam-Pryce in the Buffy/Angel franchise and also appeared in How I Met Your Mother as Robin's co-anchor Sandy Rivers in the first and sixth season.) They bought a house together in Santa Monica, California. Their daughter, Satyana Marie Denisof, was born at home six years later on March 24, 2009, Hannigan's 35th birthday.