'The Girls Next Door' React to Hugh Hefner's Death: 'He Will be In My Heart Forever'

Flanked by live-in girlfriends Holly Madison, Kendra Wilkinson and Bridget Marquardt, Hefner's wild lifestyle was chronicled for six glorious seasons and sparked four spin-offs, including "Kendra on Top," which is still airing to this day.

After the Playboy mogul's passing at the age of 91 on Wednesday, the stars of the show are speaking out on his death and how much he meant to them in life.

Wilkinson tells TooFab, "Hef changed my life. He made me the person I am today. I couldn't be more thankful for our friendship and our time together. I will miss him so much but he will be in my heart forever."

She later tweeted:

Meanwhile, Bridget posted her message to Hef on Twitter:

At this time, Madison had no comment for TooFab, which isn't too surprising considering how she spoke about their time together in her 2015 book "Down the Rabbit Hole: Curious Adventures and Cautionary Tales of a Former Playboy Bunny."

Keep reading for other reactions from more "Girls Next Door" cast members -- we'll update as more come in.

"Hef, you changed our lives and made us women! We had so much fun and made so many memories that we will never forget!! What keeps us sane is knowing we have memories of us, the pictures captured a glimpse, but our hearts captured everything like a film recorder," the Shannon Twins tell TooFab. "Thank you for giving us a kind of love not everyone gets to experience in life! Pop in on us from time to time and tell our mom in heaven we have been good girls😉 “May the wind always be at your back, And the sun always upon your face, And May the wings of destiny carry you a loft to dance with the stars!"