Alyson Lee Hannigan shows her bump: waiting for a baby for the second time.

'Buffy the Vampire Slayer' star Alyson Lee Hannigan is going to be a mother again, her rep confirms exclusively to Us Weekly. The actress' representative confirmed her impending and now quite obvious motherhood to Us Weekly, which shows 37-year-old Hannigan walking along, looking well-rounded. "Alyson is thrilled to be pregnant!" a source close to the star tells Us Weekly. "She's been wearing baggy clothes to cover the baby bump."

Hannigan and husband Alexis Denisof -- both of "Buffy the Vampire Slayer" fame, and he of "Angel" fame -- already have 2-year-old daughter, Satyana. Craig Thomas, executive producer and show co-creator, told the Chicago Tribune in 2009 that the writers just decided to make "an extra joke" out of Hannigan's impending tyke. "Why be subtle," he said.

This time, the pregnancy can just be incorporated into the storyline. In mid-May, "HIMYM" had Lily dealing with food poisoning, which, surprise, turned out to be the beginnings of a baby. Hannigan and actor Denisof, 45 have been Married since 2003.