Hugh Hefner's son Cooper is set to tie the knot with Harry Potter actress Scarlett Byrne. The 23-year-old popped the question to the British actress in London on Wednesday before sharing their exciting engagement news on Instagram.
Cooper, whose mother is Hugh's second wife Kimberley Conrad, reportedly jetted to Scarlett's hometown to ask her father for her hand in marriage before presenting her with an incredible yellow diamond ring.
Cooper Hefner proposed to girlfriend Scarlett Byrne
"To many more adventures with this lovely lady @scarleybyrne," he wrote on Instagram alongside a collage of photos of himself and his bride to be showing off her new ring.
Scarlett shared her own photo of herself and Cooper lying together, with the caption: "I was lucky enough to fall in love with my best friend."
Scarlett starred in three Harry Potter films
The actress played Pansy Parkinson in the Harry Potter series, and has gone on to star in TV shows including The Vampire Diaries and Falling Skies. The 24-year-old has been in a relationship with Cooper for almost two years.
The couple celebrated their engagement by having afternoon tea at The Ritz with their grandmothers, as well as enjoying some sightseeing at Buckingham Palace on Thursday.
"Paying a visit to Buckingham Palace with my Grandma and @scarleybyrne #London", Cooper shared on Instagram.
Sending love and congratulations to my son Cooper and his fiancee Scarlett on their engagement! https://t.co/TGejDbtpdH— Hugh Hefner (@hughhefner) August 6, 2015
Cooper's dad, Playboy mogul Hugh Hefner, was quick to offer his best wishes to his son and future daughter-in-law on Twitter, writing: "Sending love and congratulations to my son Cooper and his fiancée Scarlett on their engagement!"
Hugh has previously said that Cooper, his youngest son, is likely to take over as the public face of Playboy. The 23-year-old is set to inherit a share of Hugh's estimated $50million fortune, and regularly speaks of his admiration for his famous father, saying it is an "honour" to continue the family legacy.