Chelsea Clinton Gives Birth to Her Second Child, a Baby Boy

Update 6/9: Proud grandparents Hillary and Bill Clinton have shared their joy over Chelsea and Marc's new baby on social media. Bill was particularly happy as little baby Aidan was born just one day before Father's Day. See how they welcomed the newest member of the family:

Original: Congratulations are in order for Chelsea Clinton and her growing family! The daughter of former president Bill Clinton and current Democratic candidate Hillary Clinton welcomed a baby boy with husband Marc Mezvinsky on Saturday, announcing the happy news on Twitter:  

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

This is Clinton and Mezvinsky's second child. Their first is daughter Charlotte Clinton Mezvinsky, born in September 2014. 

This also makes Bill and Hillary Clinton grandparents twice over. They, too, expressed their excitement over the newest addition to the family in a joint statement. 

"We are overjoyed to be grandparents again with the arrival of our grandson Aidan Clinton Mezvinsky, born on Saturday, June 18, 2016. 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." 

Hillary Clinton has been especially vocal about the joys of being a grandmother. "Until it happened to me, I just could not understand the impact," she said earlier this month. "It is truly like falling in love all over again. There is nothing like it… It has for me been an absolutely life changing experience."

It's proving to be a very big year for the Clinton-Mezvinsky family!