Colbert, 'Modern Family' cast to guest host 'GMA'

Stephen Colbert and the cast of “Modern Family” are next up as “Good Morning America” guest hosts for Robin Roberts, who is scheduled to undergo a bone marrow transplant this week.

The surging ABC morning show hasn’t missed a beat since Roberts exited on Aug. 30. The co-host has MDS, a blood and bone marrow disease, and is out indefinitely for treatment that includes a transplant of marrow donated by her sister, Sally-Ann Roberts. Robin Roberts had to undergo chemotherapy before the procedure, said Tom Cibrowski, the show’s senior executive producer.