Munn urged others to take the free, online risk assessment that she credits with saving her and her mother's lives.

Olivia Munn shares how a risk assessment test led to her mom’s early HER2 breast cancer diagnosis Read ahead to know why risk assessment matters and how it can save lives

The 'Your Friends & Neighbors' star said she and her mom were there for each other for both of their double mastectomy surgeries: "There's something about watching a loved one go through it that is even more heartbreaking.