Chelsea Clinton Shares First Photo of Second Child, Aidan

— -- A day after announcing the birth of her second child, Chelsea Clinton shared a photo of the newborn.

In the photo, Clinton, 36, is seen cradling Aidan Clinton Mezvinsky as she and her husband, Marc Mezvinsky, look on.

"At 7:41 AM Saturday, our family and hearts expanded with Aidan's arrival," she captioned the photo shared on Twitter. "We are blessed."

Clinton's mother, presumptive Democratic presidential nominee Hillary Clinton, shared a different photo of the newborn featuring her husband, former President Bill Clinton.

The former secretary of state captioned the photo, "What a joy being with our new grandson, Aidan. So grateful. -H."

And in his own words, former president Bill Clinton shared his own sentiments about becoming a grandad again.

"Aidan has made two dads very happy this Father's Day," he tweeted along with a photo of himself caressing Aidan's head while Mezvinsky, 38, holds him. "Hillary and I are thrilled for Marc and Chelsea!"

Chelsea Clinton and Mezvinsky, who wed in 2010, are already parents to a nearly 2-year-old daughter, Charlotte.