On Friday, ABC's “Good Morning America" co-anchor Robin Roberts had “very successful” surgery for breast cancer, ABC’s spokeswoman said.

"The tests following her surgery take some time to process, so when we have more information we will update you," said Bridgette Maney, ABC News spokeswoman. "Thank you for your thoughts and prayers for Robin."

Earlier this week Robin Roberts, 46, announced that she was diagnosed with breast cancer.

"I didn't want you to hear it from anyone else. ... I have breast cancer, as my family here [at ABC] knows, and my family at home knows. And I'm very, very blessed and thankful that I found it early", she said.

After working on a story about Joel Siegel, a show's film critic who died of cancer, Roberts found a lump during a self-exam.

“The day we had the tribute to Joel Siegel, that very night I found a lump,” said Roberts. “Normally I would not have done anything, but Joel was resonating in my heart.”

The doctors estimated that the prognosis is good, because the tumor was detected in a very early stage.

The prognosis is "so promising that my doctor expects me to be flying planes and hanging on to submarines .... in no time in the mornings to come.", said Roberts.

Robin Roberts a former college basketball star began her career in television in 1983 as sports anchor for WDAM-TV and in 1990 she joined ESPN. From 2000, she started to work as a contributor for ABC News and in 2005 she was promoted co-anchor of Good Morning America.