Olivia Munn Opens Up About Breast Cancer Battle With Husband John Mulaney's Support

The actress shares how her husband helped her face the 'possibility of death' during her cancer treatment.

Mar. 30, 2026 at 4:34am

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Olivia Munn is opening up about her recent breast cancer diagnosis and treatment, revealing how her husband John Mulaney was by her side every step of the way. Munn, 45, said Mulaney's humor and support helped her get through the darkest moments, including facing the 'possibility of death.' The couple, who married in 2024, share two young children together.

Why it matters

Munn's candid account of her cancer journey sheds light on the emotional and practical challenges that come with a serious health crisis, especially for working parents. Her story also highlights the importance of a strong support system and the role humor can play in coping with a life-threatening illness.

The details

Munn was diagnosed with bilateral breast cancer in early 2023, shortly after testing negative for the BRCA gene. She underwent numerous operations, including a double mastectomy, lymph node dissection, reconstructive surgery, and a partial hysterectomy. Despite the physical and emotional toll, Munn said she has only cried twice, wanting to stay 'clearheaded' throughout her treatment. Mulaney was by her side for every doctor's appointment, using his notebook of joke ideas to help lighten the mood. Munn also found that returning to acting, with the help of an intimacy coordinator, aided in her recovery by making her feel more comfortable in her body.

  • In February 2023, Munn took a genetic test that came back negative for cancer genes.
  • Two months later, in April 2023, Munn tested positive for breast cancer.
  • Munn underwent treatment, including multiple surgeries, throughout 2023 and 2024.

The players

Olivia Munn

A 45-year-old actress known for her roles in shows like The Newsroom, who was diagnosed with bilateral breast cancer in 2023.

John Mulaney

Olivia Munn's husband, a 42-year-old comedian who supported his wife throughout her cancer battle.

Sara Potts

Olivia Munn's sister, who also tested negative for cancer genes.

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What they’re saying

“There's no better person in the world to me than my husband. He is — I mean, you've met him. He wanted to come to every single doctor's appointment.”

— Olivia Munn, Actress

“He's got his notebook that he writes all of his ideas for jokes and anything that comes to him through the day. You know, having the humor to go through it and having someone who is so funny, it really — it just lightens everything.”

— Olivia Munn, Actress

What’s next

Munn is continuing her recovery and plans to return to acting, with the support of her husband John Mulaney and their two young children.

The takeaway

Olivia Munn's openness about her breast cancer battle highlights the importance of early detection, a strong support system, and the role that humor and positivity can play in coping with a serious illness, even in the face of the 'possibility of death'.