Jessica Simpson, 32, and her fiancé, Eric Johnson, have welcomed son Ace on Sunday, June 30, her rep confirms to PEOPLE.
Ace will join big sister Maxwell Drew, who celebrated her first birthday May 1.
“I’m so excited to have a son,” she said at the time of her Tom Sawyer-themed shower in April. “I didn’t grow up with a brother and I think the unknown is really exciting. I can’t wait to have that connection with our little man.”