The former First Daughter and her husband of four years announced they're expecting a baby. "Marc and I are very excited that we have our first child arriving later this year. I certainly feel all the better whether it’s a girl or a boy that she or he will grow up in world filled with so many strong female leaders," the daughter of Hillary and President Bill Clinton said at an April event for the Clinton Foundation in N.Y.C. Later that day, both the mom-to-be and the future grandparents Tweeted the happy news. "My most exciting title yet: Grandmother-To-Be!" Hillary Clinton wrote.