Wilfried Zaha has been Palace's star performer this season with four goals in 10 matches.
Keogh came on with 17 minutes to go in Millwall's 2-1 victory over Bolton Wanderers and the Irish striker will also be full of confidence after he scored for the Republic of Ireland in their defeat to Germany.
Crystal Palace: WDWWWW
Possible starting lineups:
Crystal Palace: Speroni; Blake, Moxey, Delaney, Ramage; Dikgacoi, Jedinak, Moritz, Bolasie; Zaha, Murray
Millwall: Forde; Dunne, Shittu, Beevers, Smith; Malone, Trotter, Henry, Abdou; Henderson, Keogh
Sports Mole says: 3-1