Olivia Munn says becoming a mother and undergoing treatment for breast cancer left her navigating a body she no longer knew how to dress, with much of her pregnancy wardrobe suddenly unusable. Munn, 46, known for X-Men: Apocalypse and Your Friends & Neighbors, said in a new interview published on 27 August 2026 that postpartum weight gain, breastfeeding and later cancer surgeries changed both her body and her approach to fashion.
After welcoming son Malcolm in November 2021, Munn expected her body to return to how it had looked before pregnancy. Instead, she experienced postpartum anxiety for almost a year and struggled with physical changes, including larger breasts while breastfeeding. 'All of my clothes didn't fit anymore,' Munn said, describing a wardrobe problem that became tied to a bigger adjustment in how she saw herself.
Postpartum Changed Olivia Munn's Relationship With Fashion
Munn said she had initially expected to 'bounce back', but postpartum recovery made dressing herself increasingly difficult. Rather than replacing her entire wardrobe, she began moving away from trend focused pieces and towards clothes that worked with her changing body. 'I shifted my style toward comfort, simplicity and pieces that make me feel confident in my body,' she said.
The change was not simply about finding a new size. Munn said she became more intentional about what she wore, favouring timeless and versatile pieces that felt polished without forcing her body into an old version of itself. Her account captures a postpartum adjustment that continued well beyond the first months after birth, just as another major health challenge was approaching.
Breast Cancer Brought Another Series of Body Changes
In April 2023, Munn was diagnosed with Luminal B breast cancer in both breasts after a risk assessment prompted additional screening. She publicly revealed the diagnosis in March 2024, explaining that she had previously received a normal mammogram and tested negative for 90 cancer genes, including BRCA. She underwent a double mastectomy, breast reconstruction and several other procedures as part of her treatment.
Munn later underwent an oophorectomy and hysterectomy, removing her ovaries, fallopian tubes and uterus after experiencing debilitating side effects from hormone suppression treatment. The procedures meant her body was changing again just as she had begun emerging from postpartum anxiety. Munn said that after years of consecutive health battles, she no longer wanted getting dressed to reinforce the feeling that she was disconnected from herself.
Olivia Munn's Anne Klein Campaign Marks a New Fashion Chapter
That shift now sits at the centre of Munn's latest fashion role. Anne Klein named her the face of its Fall/Winter 2026 'By the Hour' campaign and a brand ambassador, with the actress photographed in tailoring, eveningwear and accessories. The brand's official campaign connects Munn's role with breast cancer awareness, giving the partnership a personal link to the health advocacy she has pursued since revealing her diagnosis.
Munn has repeatedly encouraged women to learn about breast cancer risk assessment after saying the calculation of her lifetime risk led to the additional imaging that found her cancer.
In Anne Klein's official campaign announcement, she said the Lifetime Risk Assessment Test 'saved mine', referring to her life. Her ambassadorship will also support the label's Breast Cancer Awareness Month initiatives and its longstanding support for the Breast Cancer Research Foundation.
The campaign arrives while Munn balances work on Your Friends & Neighbors with motherhood. She and husband John Mulaney welcomed daughter Méi via gestational surrogate in September 2024, after Munn underwent treatment that meant she could no longer carry another pregnancy.
For an actress who says her clothes once stopped fitting as her body changed, fashion has now become part of a larger story about dressing the body she has today rather than trying to return to the one she had before.
