Chelsea Clinton becomes mum to baby boy, welcomes youngest Hillary supporter!

Chelsea Clinton, who is already a proud mother to daughter Charlotte, turns mommy to a baby boy now.

The daughter of US Democratic presidential candidate Hillary Clinton and former President Bill Clinton, announced the arrival of newborn son Aidan Clinton Mezvinsky late Saturday morning on Twitter, reports News.com.au reports.

Chelsea tweeted about her joyous news:

Marc and I are overwhelmed with gratitude and love as we celebrate the birth of our son, Aidan Clinton Mezvinsky.

— Chelsea Clinton (@ChelseaClinton) June 18, 2016

In a statement, elated Bill and Hillary said, "We are overjoyed to be grandparents again with the arrival of our grandson. We are all over the moon as Chelsea and Marc welcome Charlotte's little brother to the world and grateful for our many blessings. Chelsea and Aidan are both doing well and enjoying this very special time together."

Clinton and her husband Marc Mezvinsky, who tied the knot in August 2010, revealed in December that she was due to give birth to a second child on Twitter, writing "Next summer, Charlotte is going to be a big sister!"