Katie Couric to Guest-Host ‘GMA’

Richard Drew / AP Photo

Former NBC "Today" show co-host Katie Couric, now the CBS "Evening News" anchor, greets the "Today" crowd in New York's Rockefeller Center Wednesday May 28, 2008. Couric appeared with ABC "World News" anchor Charles Gibson and NBC "Nightly News" anchor Brian Williams to talk about "Stand Up to Cancer", a fundraiser for cancer research that all three networks will air a simultaneously in September. (AP Photo/Richard Drew)

Katie Couric announced Thursday morning that she will return to morning television after six years when she guest-hosts Good Morning America during Robin Roberts’s vacation. The move comes as Couric is setting up shop at ABC News for her new talk show, Katie, which is scheduled to premiere in the fall. Couric co-hosted NBC’s morning powerhouse the Today show for 15 years, signing off nearly six years ago to anchor the CBS Evening News. Couric’s turn on GMA comes as the morning show has steadily chipped away at Today’s dominance in the ratings.