United Kingdom, July 9 -- Olivia Munn's mother is battling breast cancer.

The 45-year-old actress shared the news via Instagram, revealing her mum Kim Munn, 72, was diagnosed with Stage 1 HER2-positive breast cancer -less than a year after Olivia's own diagnosis.

In a caption alongside 11 pictures of Kim receiving treatment in hospital, Olivia opened up about the painful experience of watching her mother go through breast cancer, describing it as "even more heartbreaking" than her own health fight.

Olivia was first diagnosed with breast cancer in April 2023 after undergoing a Breast Cancer Lifetime Risk Assessment test.

Her results led to further testing and eventually to a double mastectomy.

She said on Instagram alongside the snaps...