After Olivia Munn was diagnosed with breast cancer in 2023, she urged her mom and sister to take a risk assessment test.

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.

Olivia Munn revealed that her mother was diagnosed with breast cancer after encouraging her to take the same Tyrer­-Cuzick breast cancer risk assessment that “saved my life.”