Transcript for She's Expecting! Chelsea Clinton Announces Pregnancy
Nngt. Ne Gen nc Major, personal announcement today from a woman we watched grow up in front of our eyes. Chelsea Clinton is pregnant. This will be a baby who attracts national interest and who could give his or her grandmother a bump in the polls. Reporter: The next generation of the Clinton dynasty is on the way. Chelsea Clinton announcing today she and investment banker husband are expecting their first child. Mark and I are very excited that we have our first child arriving later this year. But perhaps no one is more overjoyed than Hillary Clinton who tweeted my most exciting title yet, grandmother-to-be. Her desire to add grandma to her resume has not been a secret. Just last month jimmy Kimmel asked her about it at the Clinton global initiative. Do you think you and the president will have another child? Any more children? Well, no. I wouldn't mind one of those grandchildren I hear so much about. Former president bill Clinton putting on the pressure too at the world economic forum three years ago. I would like to have a happy wife. She won't be unless she is a grandmother. Something she wants more than wanting to be president. Chelsea married four years agoen a private ceremony. She and her husband were childhood friend who attended Stanford together. Today's announcement not a total surprise. Last year she spoke to "Glamour" magazine saying she hoped 2014 would be the year of the baby. I certainly feel all the better whether it is a girl or a boy. That she or he will grow up an a world full of so many strong, young, female leaders. Reporter: For one potential leaders of the free world, perhaps a secret desire to see a grand child sliding down the white house banister, certainly it would not be the first time young children have run around the white house. Even Chelsea herself grew up there before our eyes. Also, John, John, Caroline Kennedy, Amy Carter, Jenna and Barbara bush, and young American princes and princesses, who may soon have a new member in their elite club, another Clinton due this fall. For "Nightline," Cecelia Vega, in Los Angeles.
This transcript has been automatically generated and may not be 100% accurate.