Playboy heir is engaged! [PHOTO]

Congratulations to Hugh Hefner, his son, Cooper, is engaged.

The 23-year-old proposed to his girlfriend, actress Scarlett, on Tuesday, August 4th, in London with a massive yellow diamond.

Prior to the epic proposal, Cooper had travelled to ask Scarlett's father for permission to marry his daughter.

After she said yes, the newly engaged couple celebrated with their families at the Ritz hotel.

Hugh Hefner showed his support to the young couple by tweeting his congratulations.

"Sending love and congratulations to my sonand his fiancee on their engagement!"

Cooper's mother is Hugh Hefner's second wife, Kimberley Conrad.

Congrats to the lovely couple.