The Lions had Gary Alexander to thank once again as a lone first half strike pushed them up to joint third in League One.
Alexander's 35th minute effort was enough to defeat Northampton Town, who now sit just three points above the drop zone.
Charlton's small but noisy travelling contingent were rewarded with a large helping of determination, fight and spirit on Tuesday night.
Unfortunately the 2-2 draw at Reading was served on a dish of despairing defeat, as the point could not stop the Addicks drifting closer to relegation.
Booming songstress Tina Turner has put off tomorrow's gig at The O2 until May.
The performer has been advised to rest for six days by doctors after coming down with respiratory flu.
Millwall will face Northampton with the same squad that made the trip to Huddersfield last weekend.
Lewis Grabban, Paul Robinson, Chris Hackett and Alan Dunne remain out, while Danny Spiller and Danny Senda are also sidelined.
Charlton's 4-2 victory against Reading earlier this season seems to be a lifetime ago for the club's suffering fans.
Now, bottom of the Championship, Charlton face a side spurred on by a promotion hunt and a desire for revenge.
History is already littered with heroes.
So will future generations remember the brave hairy soul who valiantly cowered behind a rock for 10 minutes to avoid getting thwacked in the ribs by enemy fire?
All services on the DLR are currently suspended after a train came off the rails at West India Quay.
Further disruption is expected over the next few hours and it is not clear when services will return to normal.
Demonstrations surrounding the upcoming G20 summit are being planned as peaceful events by the groups taking part.
However, some organisers concede a minority of individuals attending may not be coming with benign intentions.
Two goals from Tresor Kandol were not enough to see Charlton overcome Watford, as the south Londoners paid for some dire defending.
The defeat leaves the Addicks on the verge of relegation, 12 points away from safety with just 10 games remaining.
Tower Hamlets residents are set to see a 1.69 per cent rise in their council tax this year.
The ruling Labour party's budget was approved at last week's special budget meeting, increasing the Band D tax from £1,175.46 to £1,195.34.