![](https://static.standard.co.uk/2023/02/15/12/newFile-2.jpg?width=460&auto=webp)
The Hills star Audrina Patridge announced the death of her 15-year-old niece, Sadie.
Patridge, who featured in all six seasons of the MTV reality series, shared the news on Instagram on Tuesday and called her passing “the hardest goodbye”, a week after they celebrated her 15th birthday.
The 37-year-old shared several photos of the teenager throughout her life in a social media tribute and wrote: “My heart hurts to even write this. My beautiful niece is now in heaven.
“I know it's not goodbye forever, but it is the hardest to say goodbye for now.”
“We will miss you and cherish every single moment we had with you. Rest in peace Say Say!! We love you forever & ever!”
In response to the tragic news, friends and fans of the reality star shared messages of support under the post.
Brody Jenner, who also starred on The Hills, wrote: “So so sorry for your loss Audrina. This is heartbreaking. Sending love to you and the family.”
While their fellow former castmate Kristin Cavallari reacted with: “Omgggg this kills me.”
Hours earlier, Patridge’s sister Casey Loza, who made occasional guest appearances on The Hills and spin-off series The Hills: New Beginnings, confirmed her daughter’s death in her own social media post and said the teenager’s story would “save countless lives”.
She wrote: “Sadie Raine Loza has left this Earth for the heavens.
“Writing this was the hardest thing I ever have had to do, not knowing the right words I’ll leave you with this, Sadie liked to remind me that the first law of thermodynamics aka (Law of Conservation of Energy) works in all spheres of life…. ’Energy cannot be created or destroyed, it can only be changed from one form to another’.
![](https://static.standard.co.uk/2023/02/15/12/GettyImages-102884734.jpg)
“Transformation is a better word than death. Her story will save countless lives, her memory will never be forgotten. Rest In Peace you brilliant starseed. You’re with your creator. We will miss you dearly. I love you.”
No details about Sadie’s cause of death have yet been shared publicly.
The Standard has reached out to Audrina Patridge’s reps for comment.