Roberts has gotten the all-clear from her doctors, according to the announcement made Thursday on "GMA." She reached the critical 100-day benchmark in December.
In January, she began a series of dry runs at the "GMA" studio to re-acclimate herself to the work routine.
Her last day on "GMA" was Aug. 30 before she started her medical leave.
About a year ago, Roberts began feeling the symptoms of her illness, known as MDS.
She said in a statement: "What a difference a year makes."