New Rotherham boss Matt Taylor spent more than four years in charge of Exeter before moving this week
Rotherham and Millwall shared the points after an absorbing clash at the New York Stadium.
It means an unbeaten start as Millers boss for Matt Taylor, who was in the dugout despite only joining the club from Exeter the previous day.
Dan Barlaser's early penalty for the hosts was cancelled out by a stunning Zian Flemming strike just before half-time.
The Dutchman later came inches away from winning it with a long-range free-kick which rattled the crossbar.
Under-fire Millwall boss Gary Rowett made six changes and employed a new 4-3-3 system but it was the hosts who gave their new manager the perfect start as they were ahead inside nine minutes.
Jake Cooper slid rashly into the marauding Ben Wiles on the right of the area, allowing Barlaser to step up and squeeze a low shot past George Long, who had dived to his right but could not prevent the ball finding the net.
The visitors grew into the game and just after the half-hour the ball came off a Rotherham head to the recalled Tyler Burey on the left of the box, but his outside of the foot poke bounced past the post with the keeper beaten.
The pressure continued and three minutes later an inviting Burey cross from the left was diverted over the bar by the onrushing Tom Bradshaw.
At the other end Brooke Norton-Cuffy tried his luck from just outside the box but sent his curling effort over the angle of post and bar on 38 minutes, and the wide man fizzed another effort into the stands from a similar position two minutes later.
The Lions went in level at the break thank to a thunderbolt from their record-signing Flemming. He found space 25 yards out and unleashed a curling left-footed drive which rocketed into the top corner past the despairing Viktor Johansson's right hand.
Three minutes after the interval Flemming took aim from even further out with his right foot, but dragged his low effort wide, while Rotherham's Chiedozie Ogbene saw a fierce strike from the edge of the area deflected wide soon after.
Ollie Rathbone pulled a low strike past the near post when he had team-mates in space, before Flemming rattled the crossbar with a stunning free-kick just before the hour - Johannson tipping the ball onto the woodwork to deny the 24-year-old a memorable double.
Bradshaw headed over at the far post after Cooper had nodded the resulting corner from Saville back across goal.
Wiles leant back to send a shot from 18 yards well over the bar for the home side after good work from Ogbene, while the outstretched Bradshaw went close to turning in a low Flemming cross-shot on the slide on 66 minutes as the end-to-end pattern continued.
Despite the visitors pressing for a winner in the latter stages, which included seven added minutes, they had to settle for a draw.
The point ended a run of three away defeats for Rowett's side, while the Millers bounced back after Saturday's 2-0 home reverse against Wigan to make it 12 points from seven home games and climbed to 13th, just three points outside the play-off places, with the Lions a point behind in 16th.
- Line-upsMatch StatsLive Text
Line-upsRotherham
Formation 3-1-4-2
1Johansson20Hall6Wood2Harding4Barlaser10Norton-Cuffy8Wiles18Rathbone3Bramall11Ogbene14Washington
- 1Johansson20HallBooked at 55mins6Wood2Harding4Barlaser10Norton-CuffySubstituted forLindsayat 90+1'minutes8Wiles18RathboneSubstituted forFergusonat 76'minutes3BramallSubstituted forPeltierat 76'minutes11Ogbene14WashingtonSubstituted forEavesat 58'minutesBooked at 79mins
Substitutes
- 9Eaves12Kelly16Lindsay17Ferguson21Peltier24Humphreys31Vickers
Millwall
Formation 4-2-3-1
1Long2McNamara4Hutchinson5Cooper3M Wallace8Mitchell23Saville21Voglsammer10Flemming14Burey9Bradshaw
- 1Long2McNamara4Hutchinson5CooperBooked at 60mins3M Wallace8Mitchell23SavilleBooked at 52mins21VoglsammerSubstituted forBennettat 76'minutes10Flemming14BureySubstituted forStylesat 85'minutes9BradshawSubstituted forAfobeat 76'minutes
Substitutes
- 6Evans7Afobe16Shackleton17Styles20Bennett33Bialkowski39Honeyman
Referee:Dean WhitestoneAttendance:8,618Match StatsHome TeamRotherhamAway TeamMillwallPossessionHome48%Away52%ShotsHome10Away14Shots on TargetHome1Away4CornersHome6Away4FoulsHome9Away8Live Text Post update
Match ends, Rotherham United 1, Millwall 1.
90'+8'Full Time
Second Half ends, Rotherham United 1, Millwall 1.
90'+7'Post update
Foul by Dan McNamara (Millwall).
90'+7'Post update
Shane Ferguson (Rotherham United) wins a free kick on the left wing.
90'+4'Post update
Billy Mitchell (Millwall) wins a free kick in the defensive half.
90'+4'Post update
Foul by Jamie Lindsay (Rotherham United).
90'+1'Substitution
Substitution, Rotherham United. Jamie Lindsay replaces Brooke Norton-Cuffy because of an injury.
89'Post update
Corner, Millwall. Conceded by Grant Hall.
87'Post update
Foul by Benik Afobe (Millwall).
87'Post update
Lee Peltier (Rotherham United) wins a free kick in the defensive half.
86'Post update
George Saville (Millwall) wins a free kick in the defensive half.
86'Post update
Foul by Brooke Norton-Cuffy (Rotherham United).
85'Substitution
Substitution, Millwall. Callum Styles replaces Tyler Burey.
84'Post update
Corner, Millwall. Conceded by Ben Wiles.
79'Booking
Tom Eaves (Rotherham United) is shown the yellow card for a bad foul.
79'Post update
Dan McNamara (Millwall) wins a free kick in the defensive half.
79'Post update
Foul by Tom Eaves (Rotherham United).
76'Substitution
Substitution, Rotherham United. Lee Peltier replaces Cohen Bramall.
76'Substitution
Substitution, Rotherham United. Shane Ferguson replaces Oliver Rathbone.
76'Substitution
Substitution, Millwall. Mason Bennett replaces Andreas Voglsammer.
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Source: bbc.com