Tragedy has struck Hugh Hefner's household the day before his birthday.
On Friday, it was revealed that the Playboy founder's younger brother Keith has passed away. He was 87 years old.
Sources have told TMZ that the Girls Next Door guest star had been battling cancer and passed away Friday morning. Although, it is unclear if Keith's sickness is the direct cause to his tragic passing.
Related: Merle Haggard Passes Away On His 79th Birthday
In case you forgot, the younger Hefner brother was a longtime executive for the Playboy brand and even handled the training and recruiting for the famous bunnies. It's reported that he can even be credited for creating the iconic "bunny dip". Wow!
Those close to Hugh have already taken to Twitter to mourn the media mogul's flesh and blood. Hugh's ex Kendra Wilkinson recently shared:
Our thoughts are with the Hefner family during this particularly trying time.
[Image via WENN.]
Tags: hugh hefner, keith hefner, kendra wilkinson, playboy, r.i.p., sad sad, twitter