Joshua Goldman
Joshua Goldman
min read · August 20, 2025 · Entertainment

Olivia Munn's Heartfelt Moment: Husband John Mulaney by Her Side Before Double Mastectomy

Olivia Munn, 45, gave her 3.1M Instagram followers a behind-the-scenes glimpse at how her future husband John Mulaney, 42, supported her during her battle with breast cancer this week

Breast Cancer Battles and Marriage Bliss: Olivia Munn's Heartwarming Story

In a poignant display of love, support, and resilience, actress Olivia Munn has opened up about her grueling battle with breast cancer, as well as the unwavering devotion of her husband, comedian John Mulaney. In a candid Instagram post shared this week, Munn gave her 3.1 million followers an intimate glimpse into her life during that difficult time.

The 45-year-old actress posted a behind-the-scenes video of Mulaney comforting her in her hospital bed just before she underwent double mastectomy surgery in May 2023. The tender moment showcases the comedian holding her hands and speaking softly to her, although his words were inaudible amidst the hospital's din. Munn couldn't help but smile at her love's presence, and the short clip concluded with Mulaney leaning forward and resting his forehead against hers.

Munn had a double mastectomy in May 2023 but didn't reveal her breast cancer diagnosis until March 2024; pictured with Mulaney in February in West Hollywood

Munn revealed that she initially kept her cancer battle private, only going public with her diagnosis in March 2024. However, in a bold move, she chose to share her story on World Breast Cancer Research Day (August 18). The actress explained that her breast cancer and her mother's are both aggressive and fast-moving, but thanks to funding for research, they were able to access effective treatments.

The importance of endocrine therapy, which Munn stated was discovered just 20 years ago, cannot be overstated. She currently undergoes this hormone therapy to prevent hormones from reaching cancer cells. The actress emphasized that because of funding for breast cancer research, there are treatment plans available that give hope to many patients like herself.

However, Munn stressed that more funding is desperately needed to find cures and perfect treatments. She urged her fans to donate to worthy organizations such as the Susan G. Komen foundation, the Breast Cancer Research Fund, and the American Cancer Society. Munn ended her caption with a message of solidarity for those going through similar health crises.

In the video, Mulaney could be seen speaking to his future wife and holding her hands, before they touched their foreheads together, but the hospital din made it impossible to hear what was said

A Family Affair: Olivia's Mother Joins Her in the Fight Against Breast Cancer

Munn's mother, Kim, was recently diagnosed with the same aggressive breast cancer as her daughter. The actress proudly shared that her mom has undergone 12 rounds of chemotherapy and will continue monthly Herceptin transfusions until this fall.

In a heartwarming display of family support, Olivia revealed that she had initially urged her mother to take the Breast Cancer Lifetime Risk Assessment test after her own diagnosis. Kim's score was a staggering 26.2%, prompting Munn to insist on an MRI, which ultimately led to her mom's diagnosis with Stage 1 Her2 breast cancer.

She urged her fans to donate for World Breast Cancer Research Day. After her double mastectomy, she went under the knife again to have breast reconstruction surgery, along with a  lymph node dissection and a hysterectomy, before ultimately going into remission; seen in February in NYC

A Love Story: Olivia and John Mulaney

Munn's Instagram post also highlighted the unwavering support of her husband, comedian John Mulaney. The couple welcomed their daughter, Méi, via surrogacy last September, and Munn was open about how her cancer treatments led to early menopause.

As she navigated her treatment plan, Olivia relied on her loved ones for emotional support. Mulaney, who has been a pillar of strength throughout her battle, would often visit her in the hospital and sit with her during chemo sessions. The couple's daughter, Malcolm, played a significant role in keeping Munn grounded during this difficult time.

Munn revealed in July that her mother Kim had been diagnosed with the same kind of breast cancer that she was diagnosed with two years earlier

When asked about how she coped with the news of her diagnosis, Munn revealed that having little Malcolm at home was a double-edged sword – it made the initial shock more terrifying but also provided an outlet for her emotions. She shared that caring for her son helped her focus on the present and put things into perspective.

"I get to be here for him," she emphasized. "That's really what matters the most to me."

A Love That Conquers All

Along with her daughter, Kim's support system included her husband Sam, as well as Olivia's husband John Mulaney who 'came often to sit and gossip with her'

As Munn reflects on her journey, it's clear that her marriage to John Mulaney has been a beacon of hope and strength throughout her battle with breast cancer. The couple tied the knot last year after a whirlwind romance that began in mid-2021.

In an Instagram post documenting her mother's treatments, Olivia featured photos of Kim with Sam, as well as pictures of John visiting his father-in-law and sharing laughs with the family. These tender moments showcased the close bond between the couples and their unwavering support for one another.

The article concludes on a high note, emphasizing that breast cancer research is crucial in finding cures and perfecting treatments. Olivia Munn's story serves as a poignant reminder of the importance of love, family, and resilience in the face of adversity.

She also uploaded a video of Kim and John lounging on the couch together at home, chitchatting a sharing a laugh with one another

'My mom¿s husband, Sam, and I learned everything we could about Her2, chemotherapy, immunotherapy, cold caps¿' Olivia wrote; Kim and Sam are pictured together

Her album included a touching photo of Kim in the middle of her recovering cradling Olivia and John's daughter Méi, whom they welcomed via surrogate last September

The suite of pictures concluded with a throwback snap of Kim and baby Olivia, mirroring the shot of Kim with her infant granddaughter

During her own ordeal with cancer, the 45-year-old actress underwent four surgeries in 10 months including a double mastectomy, driving the disease into remission

Although having little Malcolm at home made the initial news scarier, the task of taking care of him helped Olivia cope with her treatment

Olivia and John's married last year after a romance that first went public in mid-2021, on the heels of the comedian's split from his first wife Anna Marie Tendler; pictured 2024