Hugh Hefner’s son Cooper has joined the Air Force.

The youngest child of the late Playboy founder departed for basic training Tuesday, his wife, “Harry Potter” actress Scarlett Byrne, posted on Instagram.

“Today Cooper left to begin his service in the United States Air Force,” wrote Byrne, who married the 28-year-old Playboy heir last month.

“I’m incredibly proud.”

The post included a picture of the couple standing in front of the American flag, taken during Cooper’s enlistment ceremony in March.

He famously quit his dad’s beloved company in April to start his own media firm and an “adult” digital site, which has yet to launch.

Last week, Cooper announced his plans to pull away from his fledgling company.

“Today I informed leadership and financiers of Stag and Hefner Media Corporation I would be stepping back from focusing on launching a new company and stepping towards greater service to community and country,” Hefner wrote. “A new road ahead.‬”

Cooper is one of Hefner’s two sons with second wife Kimberley Conrad, who he was married to from 1989 to 2010. Hefner also had two children with his first wife, Mildred Williams.

In 2016, Cooper took over the family business as his father’s health declined, bringing back nudity to the iconic men’s magazine. Hefner died in 2017.