My most exciting title yet: Grandmother-To-Be! @billclinton and I are thrilled that Chelsea and Marc are expecting their first child!
Bill and Hillary Clinton have tweeted their joy at news of their daughter Chelsea's pregnancy.
Excited to add a new line to my Twitter bio...grandfather-to-be! @hillaryclinton and I are so happy for Chelsea and Marc!
Hillary Clinton said she was "thrilled" at the news, which Chelsea revealed during a joint event with her mother.