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Olivia Munn She was diagnosed with breast cancer in 2023 and chose to keep the news private for a year. In an open letter shared on Instagram in March 2024, the former said newsroom The star detailed how she discovered her luminal B cancer and explained why she decided to keep the information private until now. Since then, Olivia has been keeping her fans updated on her journey, with the goal of raising awareness about the type of cancer, which is the most common form of cancer among women in the United States, excluding skin cancers.
Get an update on Olivia’s health and learn more about her breast cancer diagnosis below.
Olivia Munn was diagnosed with luminal B carcinoma
On March 13, 2024, X-Men: Apocalypse The star recalled the moment she was discovered to have cancer in an Instagram post.
“In February of 2023, in an effort to be proactive about my health, I took a genetic test that checks for 90 different cancer genes,” Olivia began, “and two months later, I was diagnosed with breast cancer. … In the past 10 months, I’ve had four surgeries, spent more days in bed than I can even count… Surprisingly, I’ve only cried twice. I tended to let people see me when I had energy, when I could get dressed and dressed. “I get out of the house, when I can. I take my little one to the park. I’ve saved my diagnosis, anxiety, recovery, pain meds, and paper gowns.”
Olivia’s reason for keeping her cancer diagnosis from the public was because she “needed to find out.” [her] Breathe and get through some of the tougher parts before sharing.
“I wouldn’t have discovered the cancer for another year — at my next scheduled mammogram — until my ob/gyn, Dr. Thais Aliabadi, decided to calculate my breast cancer risk score,” Olivia continued, adding, “The fact that she did that saved my life.”
After considering various aspects such as a history of cancer in the family and the birth of a child over the age of 30, the doctor determined that Olivia’s “lifetime risk” was 37 percent.
“Because of this finding, I was sent for an MRI, which led to an ultrasound, and then a biopsy,” Olivia explained. “The biopsy showed that I had luminal B cancer in both breasts. Luminal B is an aggressive, fast-moving cancer. Thirty days after that biopsy, I had a double mastectomy. I went from feeling perfectly fine one day to waking up in a hospital bed after a 10-hour surgery the next.”
Olivia also noted that she was “lucky” that she and her doctor “caught the disease with enough time to do so.” [she] He had choices.” At the end of her letter, Olivia noted, “I want the same for any woman who may have to face this one day.”
What is luminal B carcinoma?
According to City of Hope’s Cancercenter.com, luminal B “expresses estrogen or progesterone receptors (or both)” and “does not express human epidermal growth factor receptor 2 (HER2) proteins.”
The site also notes that the two types of breast cancer, luminal A and B, differ because B “expresses the HER2 protein, which may accelerate the growth of cancer cells. As a result, luminal B breast cancer is usually more aggressive and receives a higher grade and worse prognosis than luminal A.”
How is Olivia Munn doing now?
Olivia underwent several surgeries, including a double mastectomy and a hysterectomy, along with hormone suppression therapy, and she also froze her eggs as part of her treatment.
In recent updates, Olivia said in an interview with CBS that she is doing well and continuing her recovery, although her treatment is ongoing. She has also become increasingly vocal about her experience, using her platform to raise awareness about early detection, especially after revealing that her cancer was discovered through a risk assessment test despite not showing any symptoms.
Along with her health journey, Olivia was raising her two children with her husband, John Mulaney. The couple welcomed their son, Malcolm Heap MullaneyIn November 2021, before she was diagnosed with breast cancer. They later expanded their family with the arrival of their second daughter May June Mulaneyin September 2024 via a replacement.
In February 2025, Olivia shared that although she still had “years left” in breast cancer treatment, she felt healthy. in the time At the Women of the Year party, Olivia proposed a toast to “good health.” [and] To Healthy Days,” she shared a touching story about her daughter, May, who was experiencing “a lot of discomfort” and stomach pain. Trusting her “mom’s intuition,” she changed May’s formula, and within hours, her daughter began feeling better.
“It’s one of my proudest moments as a mother,” Olivia said. “She was smiling and she was healthy, and then I realized I had been feeling good all day, too. I still have years to go from cancer treatment, but on Friday I didn’t have any pain in my joints, I didn’t feel too hot or too cold because of my surgical menopause, and my brain fog had lifted, at least for that day anyway… As I held my daughter, I was so grateful that I was healthy enough to see every minute of it all.”
Despite her health challenges, Olivia has attended many public events over the past two years. She was in attendance at the 2024 Academy Awards in Los Angeles, just days before announcing her cancer diagnosis, and has walked red carpets with John, including at the Oscars. SNL 50: Anniversary Special.
Olivia was also keen to continue the conversation about breast cancer. She has appeared on various TV shows to encourage other women to get tested.
