But Ruth and Eamonn will remain an important part of the This Morning family, as they will continue to present during the holidays.
Alison and Dermot’s first broadcast together will be on January 8 2021.
Managing Director, ITV Daytime, Emma Gormley said: “We are delighted that Alison and Dermot will be joining the main presenting family on This Morning.
“Alison has provided some of the most memorable moments on the show in recent times and teamed up with the brilliant Dermot we think they are a great pairing in addition to our fabulous presenting line up of Phillip and Holly and Eamonn & Ruth.”
This Morning airs weekdays from 10am on ITV.