One of the four University of Idaho students who were brutally stabbed to death posted a heartbreaking message online hours before her death — saying she was “one lucky girl” to spend every day with the close-knit group of friends.

Kaylee Goncalves shared the message on Instagram along with photos of herself surrounded by pals who included Ethan Chapin, 20, Madison Mogen, 21, and Xana Kernodle, 20.

“One lucky girl to be surrounded by these people,” Goncalves said.

Shortly after posting the photo, the 21-year-old was found dead Sunday with Chapin, Mogen and Kernodle in an off-campus home.

A few weeks earlier, Goncalves posted several photos showing her and Mogen growing up together, according to CBS News.

“I wouldn’t have wanted anyone else to be the main character in all my childhood stories,” she wrote.

Mogen responded:  “I love you more than life! My best friend forever and more.”

Goncalves’ oldest sister, Alivea, released an emotional statement about the family’s loss.

“Kaylee was, is, and will always be our defender and protector,” the family told KREM2, in part.

“She did absolutely everything she set her mind to. She didn’t hold back on love, fights, or life. Kaylee was the ultimate go-getter and constantly wanted an adventure,” she added.

Alivea said every one of her five siblings has a unique role in their family. As the middle child, Kaylee served as the “fairness fighter.”

Alivea described her sister as always chasing adventure and living her life to the fullest, saying there wasn’t much anyone could tell Kaylee she couldn’t do.

She told KREM2 that said she last spoke with Kaylee via text on Friday.  

Their mom, Kristi, said that after hearing the shattering news that Kaylee and close family friend Mogen were dead, it felt like she had lost two daughters, the outlet reported.

Alivea said she felt like she lost two sisters.

Meanwhile, Kernodle’s sister, Jazzmin, wrote in a text to the Associated Press that her family was anxiously waiting for updates about the investigation.

“Xana was so happy and loved, and it breaks my heart,” Jazzmin Kernodle wrote. “She was so lighthearted, and always lifted up a room. She made me such a proud big sister, and I wish I could have had more time with her.”

Jazzmin added: “She had so much life left to live.”

Kernodle and Chapin had been dating.

In one post, Kernodle wished him a happy birthday, writing, “life is so much better with you in it, love you!”