Charlton are without on-loan winger Lee Martin and defender Marcel Seip, who are ineligible to play in the FA Cup.Defender Matt Fry and captain Christian Dailly are suspended, while midfielder Jose Semedo (hamstring) and defender Gary Doherty (dead leg) are sidelined.
Luton should welcome back strikers Danny Crow and Amari Morgan-Smith after they recovered from injuries.
Loan signings Jason Walker and Alex Lawless are cup-tied, while defender Dan Gleeson (stomach) is doubtful.
Source: BBC Sport
Source: BBC Sport