And the Whedonverse circle of life rolls on… Actress Alyson Hannigan, star of Buffy The Vampire Slayer and How I Met Your Mother has given birth to a daughter, according to People. Satyana Denisof was born March 24th. Hannigan is married to Alexis Denisof, her Buffy co-star and later a cast member of Angel. One more detail from people: Hannigan "craved ginger ale" during her pregnancy. Shocking.