Sophia Brown - a contestant on Big Brother 10 - has reportedly passed away at the age of 30.
The 4ft 11in former banking assistant took part in the tenth series of the show, which was eventually won by Sophie Reade.
Writing on her Twitter page, Sophie said: "Devastated to hear the news about sophia, such an amazing lady and a pleasure to known her. Cant believe it #RIP"
BB narrator tweeted: "Such very sad news about BB 10 housemate Sophia Brown - god bless Sophia xx"
Other housemates who shared the Big Brother house with Sophia in 2009 also paid tribute including Karly Ashworth and Lisa Wallace.
Karly Ashworth tweeted: "#RIP to Sophia Brown who was also on my series of Big Brother. Such sad news. My thoughts are with her family and friends. X"
Writing on Facebook, Lisa said: "Would like to offer my condolences to Sophia brown from bb10s family and friends in their very sad loss.Sophia was a ray of sunshine. I am so glad to of had the pleasure of spending time with her in the bb house.
"Sophia, you were an angel on earth, who always could make me laugh. I know that God would have made you an angel in heaven too. You're expressions and wit will always be something that I will remember forever. The laughs we had I will treasure always.
"RIP angel. x x x x x never forgotten x x x""
It is still unknown what caused Sophia's death. She had been suffering from Lupus since childhood, a condition that affects the immune system.