AceShowbiz -

Chelsea Clinton has welcomed her first child, a baby girl, with her husband, Marc Mezvinsky. The only child of Bill Clinton and Hillary Clinton took to Twitter just past midnight on Saturday, September 27 to share the happy news.

She tweeted, "Marc and I are full of love, awe and gratitude as we celebrate the birth of our daughter, Charlotte Clinton Mezvinsky." Both Bill and Hillary retweeted their daughter's happy announcement.

Chelsea, who got married to Marc in 2007 in Rhinebeck, New York, announced her pregnancy back in April when she was speaking at a forum in New York City. "Marc and I are very excited that we have our first child arriving later this year," she said at that time, "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."

Following the pregnancy announcement, Chelsea's parents couldn't hide their excitement to become grandparents. Bill tweeted, "Excited to add a new line to my Twitter bio ... grandfather-to-be! Hillary and I are so happy for Chelsea and Marc." Meanwhile, Hillary posted, "My most exciting title yet: Grandmother-To-Be!"