MSNBC s Nicolle Wallace is now a mother of two!

The Deadline: White House anchor called in to her own show Tuesday to tell guest host Alicia Menendez that shed welcomed a baby girl, via surrogate.

Her name is Isabella Sloane Schmidt, and Mike and Liam and I are all smitten with her, Wallace said.

The dogs are still rendering judgment though, she joked.

Isabella is Wallaces first child with her husband Michael Schmidt , a reporter at The New York Times. The George W. Bush-era White House communications director shares a son, Liam, with her former husband Mark Wallace , a former U.S. ambassador to the United Nations.

Wallace acknowledged that her unexplained absence from her show had stirred rumors. I have not looked at my phone in a week, and I am amazed at the theories out there, she told Menendez. And I understand why the truth was ruled out by so many people, that Mike and I had a baby.

We were able to keep it secret obviously because I wasnt pregnant, but I never meant to keep it secret from our beloved viewers, and Im so happy to share our happy news today, she added.

Wallace said there were pros and cons to being a mom again at 51.

You are tired, she said. I was up all night last night, and I was like, Oh wow. Yeah, this is what 3:45 a.m. looks like. I dont see it a lot anymore.

It was a blessing to be focused again on what has always grounded me, and thats my beautiful family, she added. My son Liam is 11, and was in the hospital and scooped her up in his arms and was calmer than we were at the beginning.

Im so lucky and so grateful that youre there helming these hours while I take a couple months to hang out with Izzy, Wallace told Menendez, reassuring viewers that she isnt leaving the show.