Holly Willoughby, 38, and Phillip Schofield, 57, will then hand over to the Loose Women panel at 12.30pm as usual.
Piers Morgan took to Twitter to remind his fans about the schedule shake-up and he would he appearing a little later than usual.
Last night he posted: “Back to work tomorrow, with so much to talk about… tune into @GMB from 6am-9am for our new extended show.
“It won’t be a quiet one,” he commented.
Good Morning Britain airs weekdays from 6am on ITV.