Richie Towell struck again for Rotherham but the Millers had to settle for a point in their Yorkshire derby at Hillsborough as Sheffield Wednesday hit back to claim a 2-2 draw.
Lucas Joao fired the Owls ahead just before half-time but Rotherham rallied to lead. Michael Smith levelled and then on 55 minutes former Dundalk man Towell - who scored in last week's win at Norwich - drilled home a low effort from 25 yards out.
They couldn't hold on though, as Joao nodded in a good 64th-minute header, and that's how it stayed.
.@AidenObrien22 with a bottom-corner bullet to put The Lions ahead 💥 #Millwall pic.twitter.com/lmcaE3GwMi
— Millwall FC (@MillwallFC) December 8, 2018
Another Irish attacker was on the mark as Millwall and Hull played out an entertaining 2-2 draw at the Den.
Kamil Grosicki's early opener was cancelled out by Lee Gregory, with Markus Henriksen equalising for Hull after the Lions went ahead in the second half through Republic of Ireland international Aiden O'Brien.
Norwich scored a last-gasp winner against Bolton to maintain their lead at the top of the table.
Daniel Farke's side looked set to be leapfrogged by Leeds after a late Bolton fightback.
Mario Vrancic and Marco Stiepermann put the Canaries 2-0 up but Bolton, who are still winless in their last 11 league games, rallied through Sammy Ameobi and Mark Beevers' 88th-minute equaliser to level at 2-2.
Ameobi was then sent off as the 90 minutes expired before Teemu Pukki struck the winner three minutes into stoppage time.
Leeds kept the gap at just one point after coming from behind to beat QPR 2-1.
Nahki Wells opened the scoring for Steve McClaren's men but Kemar Roofe struck either side of half-time - the second from the penalty spot - to earn Leeds victory.
Derby leapfrogged West Brom into third, after the Baggies' 2-2 draw with Aston Villa on Friday, with a 1-0 win at Wigan.
Wigan's Kal Naismith saw red after 15 minutes and it did not take long for the Rams to take advantage, as Jack Marriott guided in Jayden Bogle's cross six minutes later for what proved the only goal of the game.
FT: Middlesbrough 1-1 #Rovers.
— Blackburn Rovers (@Rovers) December 8, 2018
Mulgrew's first-half goal sees us take a point from the Riverside. pic.twitter.com/UCD9DkcRGi
Middlesbrough lost ground on the leaders after being held 1-1 at home to Blackburn.
Boro were up against it after Muhamed Besic was shown a straight red card after 21 minutes for hauling down Bradley Dack when he was through on goal. Charlie Mulgrew fired Rovers ahead from the resulting free-kick.
But Britt Assombalonga rescued Tony Pulis' side a point with a 62nd-minute equaliser.
Ipswich remain rooted to the foot of the table after losing their fourth game in a row, going down 2-0 at Stoke. The hosts took the lead in first-half stoppage time as Sam Clucas slipped in Tom Ince, who fired past Dean Gerken.
Joe Allen made it two on the hour mark to extend Stoke's unbeaten league run to eight games.
A scintillating first-half display was enough for Swansea to edge past Brentford 3-2 at Griffin Park. Graham Potter's side were 3-0 up inside half-an-hour thanks to Wayne Routledge, a Chris Mepham own goal and Leroy Fer.
But Brentford fought back through Ollie Watkins and Said Benrahma to make it a tense finish for Swansea.
Famara Diedhiou gave Bristol City a 1-0 victory at Birmingham while Louis Moult scored the only goal of the game as Preston beat Nottingham Forest 1-0 at the City Ground.
