Darius Henderson scored his second goal in as many games as Millwall's unbeaten start to the campaign continued with a fine win against Nottingham Forest.
Henderson put The Lions 1-0 up with seven minutes on the clock, getting the feintest of touches to send the ball goalwards from James Henry's corner, although George Boateng may also have got a touch.
Liam Trotter made the game safe for Kenny Jackett's men 13 minutes from time to finally kill off any hopes Forest had of clawing their way back, sweeping home a delicious delivery from sub Dany N'Guessan.
"The players attitude was excellent and the early goal set us up as a counter-attacking side," said Jackett, "In the first half we had some great opportunities to score further goals, but didn't quite manage it.
I was worried in the second half though tactically, and probably should have changed it sooner, but we got the second goal and in the end got a terrific win."
It was all change again for The Lions with manager Jackett reverting to the team that started at Reading last Saturday, a total of nine players in all returning to the side that beat Plymouth on Tuesday night.
Millwall started brightly and with five minutes on the clock skipper Paul Robinson's effort from Hamer Bouazza's free-kick was blocked for the first of five first-half corners for the home team.
But The Lions didn't have to wait much longer for the opening goal, as Henderson met Henry's delivery from the left, with Boateng's deflection sending the ball soaring past keeper Lee Camp into the roof of the net.
Millwall had the bit between their teeth and Forest had skipper Luke Chambers to thank on 10 minutes when he cleared John Marquis' cross as Jackett's men threatened again.
The cheers from the visiting fans were quickly silenced four minutes later when Andy Reid's 30-yard screamer beat David Forde, but smashed into the side netting.
At the other end Forest stopper Camp was quick to gather Bouazza's dangerous 28th cross as James Henry prepared to pounce, and then Henderson had a glorious opportunity when he was played in by Henry, but a vital clearance from George Boateng prevented the striker from grabbing his second of the game.
The big frontman then headed just wide and Henry volleyed wildly over moments later as Millwall continued to press for a second goal, whilst the only noteworthy goalmouth action of the half at the home end was when Joe Garner placed a header straight into Forde's hands and Lewis McGugan fired a free-kick over on the stroke of half-time.
Forest enjoyed a lot more possession after the restart, but Forde was superbly covered by the defensive blanket of his back four, with the midfield in turn putting in a real shift and the front two opf Henderson and Marquis working tirelessly.
Forest were a whisker away from levelling on 59 minutes when Robbie Findley hit the post with a low shot from inside the six-yard box before Henderson made way for new signing Dany N'Guessan just after the hour.
Bouazza fired over seconds before Marquis was replaced by Jimmy Abdou and the Algerian international then saw his piledriver from 35 yards saved by Camp.
Millwall finally added a deserved second goal with 13 minutes remaining when N'Guessan picked up the ball on the right and whipped in an inviting ball that was drilled home with aplomb by Trotter.
That second goal handed The Lions a welcome cushion, and Trotter could have made it 3-0, only to fire straight at keeper Camp when clean through.
Despite trying to work their way back, Forest were unable to penetrate a rock soild Lions rearguard and the home team held on for a victory that moves The Lions up to fourth spot.
Millwall: Forde, Dunne, Craig, Trotter, Robinson, Ward, Bouazza, Mkandawire, Henderson (N'Guessan, 60mins), Marquis (Abdou, 65mins), Henry. Subs not used: Mildenhall, Stewart, Hackett.
Bookings: Robinson (24mins), Marquis (45+1min), Bouazza (63mins)
Scorers: Henderson (6mins), Trotter (76mins)
Nottingham Forest: Camp, Gunter, Cohen, Chambers, Morgan, Boateng, Reid (Majewski, 73mins), Greening, McGugan, Garner (Tudgay, 60mins), Findley. Subs not used: Smith, Lynch, Maloney.
Booking: Boateng (22mins)
Ref: G. Scott
Att: 12,010 (away 1,184)