As well as appearing on reality television, Sophie was a certified beauty queen, as she won both Miss Newcastle and Miss Great Britain in 2009.
The former contestant also asked her fans to reach out to their loved ones to speak to people in person, not on social media.
Releasing a statement to her followers, Katie penned: 'Isn't it insane how someone so stunning, so smiley and appeared so happy can feel no way out.
Aaron Armstrong was Sophie's boyfriend at the time of her death.
We would like to offer our condolences to the friends and family of Sophie, who was loved by many.
Nathan Henry tweeted: "Rest in peace you attractive little angel, the heavens are blessed with a attractive smile".
During her time on Love Island, Sophie was very much loved by viewers. "I'm so lucky to have met you", Buckland wrote. In a lengthy Twitter post, Salmon said that Gradon's "smile will be remembered forever". Too young, too sweet. Online: 'I'm heartbroken and am disappointed in the support system, we still have much to do for mental health.
He wrote: "I will never forget that smile".
Gradon's boyfriend, Aaron Armstrong, announced the tragic news on his Facebook page, saying he is "absolutely devastated" by her death.
Authorities arrived at a home in Medburn, Ponteland, just before 8:30 PM and found the 32-year-old woman dead, Northumbria police said, via Sky News' report. A report will now be prepared for the coroner.
On Twitter, as her beau cradled his dog, she gushed: "When the love of your life loves his dogs like this you know he's the one".