Former president Bill Clinton took to Twitter shortly after 5pm on April 17, 2014 to reveal his family will be getting a new addition.
"Excited to add a new line to my Twitter bio...grandfather-to-be! @hillaryclinton and I are so happy for Chelsea and Marc!"
"My most exciting title yet: Grandmother-To-Be! @billclinton and I are thrilled that Chelsea and Marc are expecting their first child!" tweeted Hillary Clinton
34 year-old Chelsea also went to Twitter confirming her pregnancy writing: "Marc and I are so thrilled to be expecting our first child in the fall! Thank you for all of the kind words!"
Chelsea is the only child of former U.S. President Bill Clinton and former U.S. Secretary of State Hillary Rodham Clinton. She is a special correspondent for NBC News and works with the Clinton Foundation and Clinton Global Initiative.
Her husband Marc Mezvinskyis the son of Marjorie Margolies-Mezvinsky, Pennsylvania Democratic Congresswoman, and former Iowa Democratic Congressman Edward Mezvinsky. The couple married July 31, 2010.