Kate and Gerry McCann are expected to call on Portuguese authorities to reopen the case into their daughter's disappearance.
Madeleine went missing while on holiday with her family five years ago.
Daybreak's Richard Gaisford reports from the town of Praia Da Luz where Madeleine went missing. He says police there are reluctant to reopen the investigation.
Here is a timeline of the key events since Madeleine McCann's disappearance.
I've been interviewing the McCanns about Madeleine for five years now and the first thing that strikes you is their togetherness.
The McCanns said they have "no doubt" the Portuguese police will eventually reopen the investigation into Madeleine's disappearance.