Celebrity Celebrity Moms Chelsea Clinton Is Expecting Baby No. 2 By Alexis Bennett Alexis Bennett Alexis Bennett is a New York-based writer who covers all things fashion, shopping, and beauty. She was previously the Ecommerce editor at InStyle. InStyle's editorial guidelines Updated on December 21, 2015 @ 04:30PM Pin Share Tweet Email Photo: Taylor Hill/FilmMagic Chelsea Clinton's family has a lot to celebrate this holiday season. The 35-year-old daughter to Hillary and Bill Clinton confirmed today that she is expecting her second child with husband Marc Mezvinsky, 38. The exciting news comes just a little more than a year after Chelsea gave birth to daughter Charlotte Clinton Mezvinsky. The proud mom made the announcement via Twitter: "Next summer, Charlotte is going to be a big sister!" she tweeted, along with an adorable photo of Clinton's firstborn perusing an open a book with the words "Big Sisters Are the Best" illustrated across the page: Chelsea Clinton's Changing Looks The expectant mom also wrote in the message to her followers, "Feeling very blessed & grateful this holiday season." Here's to the growing family!