Olivia Munn at the 96th Annual Oscars held at Ovation Hollywood on March 10, 2024 in Los Angeles, California.Gregg DeGuire/WWD via Getty ImagesOlivia Munn, 43, reflects on her emotional experience after undergoing a double mastectomy due to breast cancer."I saw myself for the first time and I was in shock," Munn told People.Cases of breast cancer among people under 50 years old are on the rise.Olivia Munn, 43, remembers the shock she experienced when she saw her body for the first time after a double mastectomy.The "X-Men: Apocalypse" actor — who was diagnosed with breast cancer in April 2023 — spoke to People about her medical journey over the past months.Munn said she underwent four surgeries, including a 10-hour double mastectomy, as part of her treatment plan."I really tried to be prepared, but the truth is that nothing could prepare me for what I would feel like, what it would look like, how I would handle it emotionally.