“Good Morning America” anchor Robin Roberts has breast cancer. The ABC hostess made the announcement on Tuesday.

Robin says a few weeks ago while doing a self-examination, she came across a lump.

“It all started a few weeks ago. We had gotten the news that our dear colleague and friend JOEL SIEGEL had passed away and we began preparing for our special tribute show for him. I did a piece about Joel’s courageous battle with cancer, reporting on the way my friend had lived his life and been such a successful advocate for the importance of early cancer screenings. That very night when I went to bed, I did a self breast exam and found something that women everywhere fear: I found a lump.”

“I will be having surgery shortly and follow-up treatment in the months to come,” Roberts said on today’s “Good Morning America” broadcast. “So in the coming months, you will probably notice that I will have my good days and my bad days, but I know I will get through it with the love and support of my family and friends.”

“To you, our viewers, please know that your thoughts and prayers very much sustain me as they always have each and every morning when I sit in the chair next to DIANE [SAWYER] and say ‘Good Morning America.’ You have always been there for me … and I love you back.”

Get Well Soon, Robin.