WASHINGTON — For the Clintons, 2014 is the year of the baby.

Chelsea Clinton, the 34-year-old daughter of former President Clinton and ex-Secretary of State Hillary Rodham Clinton, announced Thursday that she and her husband, Marc Mezvinsky, are expecting their first child this fall.

There has been wide speculation about a future baby in the Clinton family. Chelsea Clinton said in an interview with Glamour magazine last year that she and her husband were hoping to start a family soon, calling 2014 “the year of the baby.”

“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 female leaders,” Clinton said in New York, joined by her mother at a Clinton Foundation event on empowering women.

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“I just hope I will be as good a mom to my child and hopefully children as my mom was to me,” she said.

The former first lady, secretary of state and New York senator, who is considering another presidential campaign in 2016, said she was “really excited” about becoming a grandmother.

She later added on Twitter: “My most exciting title yet: Grandmother-To-Be!”

The former president also expressed jubilation about the news on Twitter: “Excited to add a new line to my Twitter bio … grandfather-to-be! @HillaryClinton and I are so happy for Chelsea and Marc!”

The former secretary of state is expected to announce her decision whether she will run for president later this year.

Chelsea Clinton and Mezvinsky, the son of two former members of Congress, were married in Rhinebeck, N.Y., in July 2010.