Alyson Hannigan, Alexis Denisof welcome a second baby girl Kids, in the summer of 2012, your Aunt Lily had a baby. Well, her real-life counterpart, Alyson Hannigan, and hubby Alexis Denisof had one, anyway. The "How I Met Your Mother" actress and her husband welcomed their baby girl, Keeva Jane Denisof, on May 23. "They are all doing well," Hannigan's representative told People magazine. Hannigan kept the birth under wraps for weeks, but Tuesday tweeted a photo of her new bundle of joy's fist, giving the Twittersphere its first glimpse of the child. Or part of her at least. She captioned the teaser: "Love." Congratulations soon rolled in from Hannigan's "Buffy the Vampire Slayer" costar Felicia Day. "omg so beautiful! Congrats!!!!!!" the actress tweeted. Hannigan, 38, whose "HIMYM" character coincidentally gave birth at the end of Season 7, is also mom to 3-year-old Satyana. The show's writers covered up Hannigan's baby bump while she was pregnant with her first daughter, but worked it into the story line in the latest season. She wasn't just sporting her baby bump in the small screen: Fans got a look at it at the "American Reunion" premiere in March. Denisof, of "Buffy" and "Angel" fame, has appeared on his wife's CBS sitcom in the recurring role of Sandy Rivers. Hannigan met Denisof, 46, on the set of cult fave "Buffy" and married him in 2003. David Arquette files for divorce from Courtney Cox Alyson Hannigan is pregnant. What a coincidence, so is Lily! Andrew Garfield on "Amazing Spider-Man" chemistry with Emma Stone