Clinton, who gave birth to Aidan on Saturday, posted a photo of her and her husband Marc Mezvinsky Sunday on Twitter. Clinton and Mezvinsky welcomed their second child just in time for Father's Day.
Presumptive Democratic nominee and Chelsea's mother, Hillary Clinton, also shared a photo of her and Former President Bill Clinton holding baby Aidan.
And, of course, Bill Clinton and Mezvinsky posed for a sweet photo to share their first Father's Day with the newborn.
The couple have a 20-month-old daughter, Charlotte. Both Charlotte and Aidan were born at Manhattan's Lenox Hill Hospital.
On Saturday, Clinton said the couple was "overwhelmed with gratitude and love."
The Associated Press contributed to this report.