Chelsea Clinton—daughter of presumptive Democratic nominee Hillary Clinton and former president Bill Clinton—gave birth to a son, Aidan, on Saturday.
The couple’s firstborn child, Charlotte, was born in September 2014 and will turn 2 this year.
“We are overjoyed to be grandparents again with the arrival of our grandson, Aidan Clinton Mezvinsky,” Hillary and Bill Clinton said in a statement on Saturday, NBC News reports.
“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,” the statement said.