[ABC News]

Amy Robach underwent a mammogram live on “Good Morning America” on Oct. 1. (Courtesy of Ida Mae Astute/ABC)

Former TODAY anchor and current ABC News correspondent Amy Robach announced Monday on “Good Morning America” that she has breast cancer, a diagnosis revealed only after she reluctantly underwent her first mammogram live on-air.

Robach, 40, made the announcement on “GMA” as a follow-up to the live mammogram she underwent Oct. 1 to kick off Breast Cancer Awareness month. She acknowledged she had put off getting the procedure done for a year, even though she knew her age warranted one. She spoke about how “GMA” anchor Robin Roberts, a breast cancer survivor, convinced her she should have the procedure done publicly.

“If I got the mammogram on air and it saved one life, then it’s all worth it, she had said,” Robach said. “It never occurred to me that life would be mine.”