ABC Correspondent and Good Morning America contributor Amy Robach announced Monday morning that she has breast cancer and will undergo a double mascetomy.

She appeared on GMA and revealed that her diagnosis is still hard for her to talk about. Robach's diagnosis was revealed after she underwent a mammogram on a recent episode of GMA to help raise awareness about breast cancer. Robach admitted that she didn't want to get tested, especially since she has no family members with the disease, but Robin Roberts--a breast cancer survivor persuaded her to do so.

"Thank god you did," she told Roberts. "I had cancer the whole time we were sitting in that office, and I said, I don't have any connection to that disease."

"You saved my life," she added.

"YOU saved your life, Amy," Roberts replied.

In a personal blog on ABCnews.com, Robach writes about the day she went in for the screening on national television for fans at home to witness.

"So on Oct. 1, I had my first mammogram, in front of millions of people. After breathing a big sigh of relief once it was done, my breath was taken away only a few weeks later. I thought I was going back in for a few follow-up images, only to find out in a matter of hours that I had breast cancer. I was alone that afternoon, never thinking to bring anyone with me, never thinking that day would be life-altering. My husband was on a business trip and my parents live across the country, but that night everyone flew into New York City and we started gearing up for a fight," she wrote.

Robach will go into surgery on Thursday, Nov. 14 where doctors will perform a bilateral mastectomy followed by reconstructive surgery.

"The doctors told me bluntly: 'That mammogram just saved your life," she added.

Watch Robach's touching video here:

Tags: amy robach Good Morning America Robin Roberts