"Excited to add a new line to my Twitter bio...grandfather-to-be!" the 42nd president tweeted on Thursday. He added: "@h and I are so happy for Chelsea and Marc!"
The former secretary of state wrote: "My most exciting title yet: Grandmother-To-Be! and I are thrilled that Chelsea and Marc are expecting their first child!"
Excited to add a new line to my Twitter bio...grandfather-to-be! @hillaryclinton and I are so happy for Chelsea and Marc!? Bill Clinton (@billclinton) April 17, 2014
My most exciting title yet: Grandmother-To-Be! @billclinton and I are thrilled that Chelsea and Marc are expecting their first child!? Hillary Clinton (@HillaryClinton) April 17, 2014
The glowing 34-year-old announced on Thursday in New York City that she and husband Marc Mezvinsky are expecting their first child. She broke the exciting news during a joint event with her mother for the Clinton Foundation's "No Ceilings: The Full Participation" project.
"I have one more thing to say very quickly," the former first daughter said near the conclusion of the event. "I just want to thank all of you for being such an inspiration to us and to me in particular. Marc and I are very excited that we have our first child arriving later this year."
"And I certainly feel all the better, whether it's a girl or a boy, that she or he will grow up in a world with so many strong, young female leaders," she said.
Besides Hillary and Bill, several other celebrities offered their well-wishes for the couple.
.@ChelseaClinton is going to have a baby! No reports yet if it's a boy or girl, but it did just win a seat in the Illinois General Assembly? Ellen DeGeneres (@TheEllenShow) April 17, 2014
Wishing I was Chelsea Clinton's fetus? Lena Dunham (@lenadunham) April 17, 2014
Clinton and Mezvinsky tied the knot in June 2010.
Congrats again to the entire family!