Cooper Hefner is a dad.

Hefner announced late Monday that he and his wife, Scarlett Byrne, had welcomed their first child, a baby girl named Betsy Rose.

“At 5:23pm this afternoon Scarlett and I welcomed our daughter Betsy Rose Hefner into the world,” Hefner captioned a series of photos of his wife and newborn. “We are overwhelmed with gratitude, love and joy.”

Cooper, the 28-year-old son of the late Hugh Hefner, and the “Harry Potter” actress, 29, married in November 2019 after announcing their engagement in August 2015.

Page Six exclusively reported in February that Cooper graduated from Air Force boot camp. He since has launched an exploratory campaign for a seat in the California Senate.