Roy Hodgson has made three changes to the side which kicked-off against Charlton Athletic on Saturday, bringing Vicente Guaita, Max Meyer and Jeffrey Schlupp into the starting XI to face Millwall.
The clash with the Lions will be Guaita's first of the pre-season, while Meyer featured against Oxford United and Schlupp has appeared in both games so far.
The trio replace Wayne Hennessey, Andros Townsend and Eberechi Eze in the Palace lineup. All three of the replaced players are not in the squad today, with Eze and Hennessey called-up to international duty.
This leaves the Eagles with a very youthful bench, including teenagers Malachi Boateng, John-Kymani Gordon and Brandon Pierrick.