Kaitlyn Dever mourns mother's passing from breast cancer: 'Thank you for fighting so hard for us for so long'

Dever previously shared that her mother Kathy had been battling stage 4 metastatic breast cancer.

Kaitlyn Dever's mother Kathy Dever has died after a 14-year battle with breast cancer.

The young star, 27, penned a tribute to her mother alongside a carousel of images on Instagram on Wednesday, remembering her as "sunshine" and "the sweetest in the world."

"I don’t even have the words," Dever said in the post. "Nothing I’ll ever say will amount to the gifts you have given me in my life, the boundless joy you brought, the deep, endless, unconditional love you gave me and our family. Your love was everywhere. It was in the morning having coffee with you and shopping on the real real, it was sitting out by the pool eating watermelon (with salt on it of course) and listening to Willie Nelson, it was laying in your bed with you watching Seinfeld and listening to your infectious laugh as you recited every line from memory, it was making fun of each other."

"Your love was like sunshine," Dever continued, "warmed me when I needed it the most and made me smile when I was ever sad. You were everyone’s favorite. You are my favorite. The sweetest in the world. I will be broken forever without you and I don’t know how I’ll go on." Dever also thanked her mother for "fighting so hard for us for so long." She added, "You made everything better. My sweetest, beautiful girl. My best friend. Oh how much I love you. What a gift it is to love you. I love you forever and ever, Mom."

Dever shared in October 2020 that her mother had been battling stage 4 metastatic breast cancer for 10 years. The matriarch was diagnosed at the age of 39, "and everyday since has been a terrifying battle," Dever shared at the time. "Every day is different and we’ve gotten through it together as a family," she said, calling her mother the "strongest woman I know."

In addition to Kaitlyn, Kathy Dever is survived by two other daughters, Mady and Jane, and husband Tim.

Dever, best known for her roles in the film Booksmart and miniseries Unbelievable, most recently appeared in the series Dopesick and movies Ticket to Paradise, Next Goal Wins, and Good Grief. She will next appear in the series The Last of Us as Abby.

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