The actress and her husband, Alexis Denisof, also have a 3-year-old daughter.

Alyson Hannigan is a mom again.

The How I Met Your Mother star and her actor husband, Alexis Denisof, welcomed a baby girl named Keeva Jane Denisof on May 23, her rep told People. Hannigan announced the news Tuesday via her Twitter account, where she posted an Instagram photo of the newborn's hand.

http://www.hollywoodreporter.com/news/how-i-met-your-mother-alyson-hannigan-baby-336461

Alyson Hannigan is used to posing for multiple photographers at once.

And now so is baby Keeva!

The 1 1/2-month-old opted to nap instead of smile while daddy Alexis Denisof snapped iPhone photos of his wife and two daughters—but, what do you know, she still looked picture-perfect in what turned out to be her public debut, thanks to an obliging paparazzo.

MORE: Sienna Miller Welcomes a Baby Girl—Check Out Her Name!

Hannigan, Denisof, Keeva and 3-year-old Satyana were enjoying the breezy weather at Will Rogers State Park, which overlooks the ocean in L.A.'s Pacific Palisades neighborhood, when dad stopped to capture the moment for posterity.

As luck would have it, they weren't alone, but the family of four didn't let the ever-present paparazzi stop them from enjoying a picnic, some soccer and plenty of cuddle time.

Keeva, which means gentleness and beauty in Gaelic, was born May 23. Aside from an Instagram pic of her adorable little hand, this is the first we've seen of her.

http://www.eonline.com/news/328850/baby-debut-alyson-hannigan-poses-for-photos-with-daughter-keeva

http://www.eonline.com/eol_images/Entire_Site/201269/reg_634.AlysonHanngian.jc.070812.jpg