Baby joy! Hugh Hefner's son, Cooper, and his wife "Harry Potter" star Scarlett Byrne are expecting their first child together.

Cooper, 28, revealed the exciting news on Instagram on Tuesday.

"Scarlett and I have been blessed with wonderful news we are ecstatic to share," he wrote. "This summer we will be welcoming a new member to the family.

HUGH HEFNER'S SON JOINS AIR FORCE, HALTS PLAN TO LAUNCH NEW MEDIA COMPANY

"The two of us could not be happier as we wait for the arrival of our little one," Cooper added.

Cooper also shared a photo of Byrne, 29, sitting with her hands placed right below her baby bump, as well as a short video of the couple walking hand-in-hand on the beach.

HUGH HEFNER'S SON, COOPER, MARRIES ‘HARRY POTTER’ ACTRESS SCARLETT BYRNE

Cooper Hefner and Scarlett Byrne arrive at Playboy Club New York Grand Opening on September 12, 2018 in New York City. 

Cooper Hefner and Scarlett Byrne arrive at Playboy Club New York Grand Opening on September 12, 2018 in New York City.  (Steven Ferdman/Getty Images)

Scarlett also took to her own social media account to share the news, writing: "Cooper and I are delighted to share that we have a little one on the way. Our hearts are filled with gratitude and joy, and the two of us can’t wait to meet the newest little Hefner."

CLICK HERE TO GET THE FOX NEWS APP

The actress, who starred as Pansy Parkinson in the "Harry Potter" franchise, shared the same photo as Cooper, as well as another sweet snapshot of the couple.

Cooper and Scarlett married in November 2019.