Congratulations are in order for Chelsea Clinton and husband Marc Mezvinsky, who welcomed their second child into the world today.

NEW YORK, NY - MAY 19: Chelsea Clinton (L) and Marc Mezvinsky attend the 2015 Statue Of Liberty-Ellis Island Foundation's Gala in the Great Hall at Ellis Island National Museum of Immigration on May 19, 2015 in New York City. (Photo by Paul Zimmerman/Getty Images)

Chelsea announced her pregnancy via Twitter back in December, when she shared the news that her daughter Charlotte would soon become a big sister. Taking to Twitter once again, Chelsea not only announced her precious new arrival, but revealed his name as well:

What a handsome name, indeed! We think Carrie Bradshaw would approve too, Chels (we can’t speak for Big)!

Grandma and presidential hopeful Hilary Clinton, who recently became the first woman to be nominated by a major party, retweeted Chelsea’s news and released a joint statement to E! with Bill in which they said, “We are overjoyed to be grandparents again with the arrival of our grandson, Aidan Clinton Mezvinsky… We are all over the moon as Chelsea and Mark welcome Charlotte’s little brother to the world and grateful for our many blessings.”

What an exciting year this is turning out to be for the Clintons! Best wishes for them and their new addition.

What do you think of the couple’s choice? Let us know over @BritandCo!

(h/t E!, photos via Cindy Ord and Paul Zimmerman/Getty and @ChelseaClinton)