Gail Roboz

ABC News reports that Robin Roberts made a much anticipated return to the Times Square Studio of GOOD MORNING AMERICA for a behind-the-scenes test run this morning. Roberts arrived at the studio at 5 a.m. after waking at 3:45 a.m.

Robin Roberts will undergo a bone marrow transplant today, three months after revealing to GOOD MORNING AMERICA viewers that she was diagnosed with the rare disease MDS. Check out her inspirational message which she sent out to viewers from her hospital bed.

GOOD MORNING AMERICA host Robin Roberts wrote on her personal blog that she is scheduled to undergo a bone marrow transplant this Thursday. The bone marrow she is receiving will come from her sister, Sally.