Chelsea Clinton has a new bun in the oven!

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On Monday, the daughter of politicians Bill and Hillary Clinton, took to her Facebook page to announce that she is pregnant with her second child.

She posted a photo of her first daughter, Charlotte, 1, as she looks at a book about being a big sister.

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In the caption, Chelsea wrote, "Next summer, Charlotte is going to be a big sister! We are feeling particularly blessed and grateful this holiday season."

She then added how excited she is to expand her family with her daughter and husband, Marc Mezvinsky.

Next summer, Charlotte is going to be a big sister! We are feeling particularly blessed and grateful this holiday...

Posted by Chelsea Clinton on Monday, 21 December 2015

"Being Charlotte's parents has been the most joyous, meaningful and loving experience of our lives and we are very excited about growing our family in the new year."

In a post from Us Weekly, Chelsea's mother told her how ecstatic she is for her second future grandchild.

"Your dad and I could not be happier for you, Marc, and Charlotte," Hillary told her daughter. "We're so excited to meet our second grandchild!"

Chelsea gushed to Elle earlier this year about her baby girl.

"My whole life is reoriented around my daughter in the most blessed sense," Chelsea said. "I now understand- this is something else that Marc and I talk about all the time- all of the enthusiastic, bombastically spectacular, wonderful things people say about their children because we also feel and think all those things about Charlotte."