Taylor Hill/FilmMagic
Alexis Bennett
Dec 21, 2015 @ 4:30 pm

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:

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The expectant mom also wrote in the message to her followers, "Feeling very blessed & grateful this holiday season." Here's to the growing family!

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