The Addicks head to Sixfields Stadium on Good Friday for the first of two games in four days over the Easter weekend as Lee Bowyer takes his second game in charge as Caretaker Manager.
Bowyer got off to the perfect start last weekend with an impressive victory over in-form Plymouth Argyle which leaves Charlton two points off the play-off places with a game in hand.
The Cobblers, meanwhile, managed by former Addick Jimmy Floyd Hasselbaink, are fighting for survival and currently occupy fourth from bottom, in the relegation zone with no victories in their last seven games.
Lee Bowyer will be able to call on Josh Magennis and Ezri Konsa after the duo missed last Saturday’s win due to being on international duty.
Stephy Mavididi is set to return to the squad for the first time since suffering a hamstring injury in early February and is likely to take his place amongst the substitutes, while Jay Dasilva has an outside chance of being involved after training with the group during the week.
The game at Sixfields will come too soon for Ahmed Kashi, while Chris Solly and Billy Clarke both remained sidelined.
Matt Crooks is available again for the hosts having served his suspension, but John-Joe O’Toole will serve the second game of his three-match ban.
Charlton have met Northampton on 32 previous occasions, with the Addicks winning 10 and the Cobblers nine, with the remaining 13 encounters ending in draws.
The Addicks came out on top with a 4-1 victory in the reverse fixture back in August with Josh Magennis, Ricky Holmes and Jake Forster-Caskey (2) on the scoresheet.
Our last trip to Sixfields ended in a 2-1 defeat last March.
Gavin Ward will be the man in the middle on Good Friday. He has taken charge of 38 games so far this season, showing 104 yellow cards and four red.
He last refereed the Addicks during the 1-0 defeat to Oxford United at The Valley last season in which he sent off Chris Solly.
Supporters can follow all the build-up to the game on Charlton's official Twitter account, official Instagram account, Facebook page and official Snapchat account.
Live commentary of the clash will be available on Valley Pass exclusively for subscribers. Please click here for more information on how you can subscribe to Valley Pass and how you can purchase a 48-hour matchday pass, which is priced at just £4.
Over 1,100 tickets have been snapped up, but the club have been informed by Northampton Town that tickets will not be available on the day.