YouTuber Adalia Rose Williams, who was fighting a rare genetic disease called Hutchinson-Gilford progeria, died Wednesday evening. She was 15 years old.

The heart-breaking news was shared on her official Facebook on Thursday, which revealed she died at 7.00 p.m.

"Adalia Rose Williams was set free from this world. She came into it quietly and left quietly, but her life was far from it," the official handle wrote along with a photo of Williams. "She touched MILLIONS of people and left the biggest imprint in everyone that knew her."

The post further stated the YouTuber -- with 2.91 million subscribers -- was no longer in pain.

"She touched MILLIONS of people and left the biggest imprint in everyone that knew her," the post added. "She is no longer in pain and is now dancing away to all the music she loves. I really wish this wasn’t our reality but unfortunately it is."

The post also thanked everyone for their love and support toward Williams, including doctors and nurses that "worked for YEARS to keep her healthy."

"The family would now like to mourn this huge loss in private," the post concluded.

The Facebook post has received 820,000 reactions, 161,000 comments and over 108,000 shares. The comments section was flooded with condolences.

"Ohhhhh my confidences _ sweetheart she was. Always positive and full of love ❤ ️ may her soul Rest In Peace," a fan wrote while another fan commented, "This makes me so sad. Adalia Rose brought so much love and joy to the world. May she rest in peace."

“Heartbreaking news! Thanks for all the smiles and laughter over the years, Adalia. Sending love and positive vibes to those who knew and loved her,” a user commented.

Williams revealed three weeks ago on Instagram she lost her hearing ability.

She was diagnosed with progeria when she was 3 months old, and she has been documenting her life on YouTube and various social media platforms for the last nine years with help of her family members.

Besides her health update, she also used to share makeup tutorials, skits and dancing videos.

Progeria is a progressive genetic disorder that causes children to age fast. While there is no cure for progeria, there are medications available to reduce the symptoms of this extremely rare condition to some extent.

Nguyen Thi Ngoc, 13, practices her writing at home in Ho Chi Minh City. Ngoc is Vietnam's first known case of Hutchinson-Gilford Progeria Syndrome, a rare disease which ages the body so rapidly its victims die before they have barely experienced yout Nguyen Thi Ngoc, 13, practices her writing at home in Ho Chi Minh City. Ngoc is Vietnam's first known case of Hutchinson-Gilford Progeria Syndrome, a rare disease which ages the body so rapidly its victims die before they have barely experienced youth. Photo: Reuters