Olivia Munn has for more than a year been speaking out about the importance of a breast cancer risk assessment test that helped lead to her diagnosis in 2023, and she has now shared that that very same test also led to her mother’s breast cancer diagnosis.

"There's something about watching a loved one go through it that is even more heartbreaking," the mother of two writes.

Olivia Munn is opening up about her mom's breast cancer diagnosis. The "Your Friends and Neighbors" star, 45, took to Instagram on Wednesday and revealed that her mom was diagnosed with Stage 1 HER2 breast cancer after Munn's own breast cancer diagnosis in 2023.