Included in the list of upcoming hosts are cast members of "Modern Family." One new actor from the show will be featured every day for a week.
"GMA" senior executive producer Tom Cibrowski revealed other slated guests, including Stephen Colbert, Oprah Winfrey, actor Rob Lowe, Barbara Walters, Katie Couric and Diane Sawyer. The newswomen are expected appear on the show sometime next month.
Jessica Simpson was featured as the show's first celeb fill-in on the Sept. 11 episode.
Roberts took an indefinite leave Aug. 30 after she was diagnosed with MDS, a blood and bone marrow disease. She is scheduled to receive a bone marrow transplant from her sister, Sally-Ann Roberts, later this week. Roberts has already undergone chemotherapy treatments.
The Associated Press contributed to this report.