Last Updated: 24/05/14 5:01pm
The whistle goes for half-time and Derby's dreams have been dashed by Zamora's late strike, with QPR winning 1-0 at Wembley to secure promotion back to the Premier League. QPR had to withstand an onslaught after O'Neil's red card left them with ten men, but they managed to find a goal from nowhere to seal the most dramatic of victories.
Derby win a last-gasp corner and Grant sprints forward. The ball drops for Keogh and he has a chance for redemption, but his shot flies over the bar.
Derby look stunned as three minutes of stoppage time are signalled, and McClaren makes his final change of the afternoon and throws Bamford on for Ward.
GOAL! Zamora fires QPR in front. Totally against the run of play, QPR find themselves in the Derby half for a throw-in and Hoilett shows great determination to get in a cross. Keogh's clearance is poor and Zamora pounces to shoot high past Grant and most probably seal promotion.
QPR offer a reminder of the threat they pose as Barton lets off a powerful long-range shot which fizzes narrowly wide of Grant's left-hand post.
Green shows good command of his area as he rushes off his line to reach out and gather a high ball ahead of Martin.
Hendrick's deflected shot from 20 yards takes a slight deflection but not enough to unsettle Green, who gets his body behind the ball to make a routine save.
Derby just cannot find the cutting edge I their final pass or shot, as Forsyth's left-wing cross is headed powerfully away by Dunne.
QPR finally get out of their own half but only for an instant before Derby pile forward again, until Dawkins catches Onuoha with a late tackle and concedes a fou.
Dawkins has looked a threat since coming on but a wayward pass just relieves the pressure as QPR continue to stand firm.
QPR are camped right on the edge of their own area and there are no attacking outlets for them at the moment. There will be an extra half an hour if the teams cannot be separated. Can QPR hold on that long?
Wisdom tries to wriggle away from Traore down the right but his enthusiasm gets the better of him and he is adjudged to have fouled the QPR full-back.
Even Austin is having to put in a defensive shift for QPR, as he puts his body on the line to block Martin's shot from distance.
Green keeps QRR on level terms with a fine save away to his right to deny Dawkins after good link-up play with fellow substitute Bryson. The ball rebounds to Ward but his shot is inadvertently deflected away from goal by one of his own team-mates.
Dawkins brings down a high ball into the area but the flag is raised for offside and QPR have a moment to catch their breath.
It is one-way traffic now as you might expect, with Derby keeping the tempo high and getting the ball out wide at every opportunity to try and stretch QPR.
Traore stays strong to shepherd the ball back to Green, and the referee is happy that it is not a back-pass as the keeper gets down to claim the ball.
Green makes another instinctive save at his near post as he cuts out the angle on a fierce strike from Martin from 12 yards.
Bryson latches on to Hendrick's pass as he finds a pocket of space in the area, but his shot is parried away by Green at his near post.
Redknapp's final change sees Henry come on for Hill, which will mean that Traore will revert to left-back and there will be a reshuffle in midfield.
QPR are dropping deeper as they try to soak up Derby's pressure, but the gaps will surely now start to appear.
Derby will be looking to ram home their numerical advantage now as their fans spur them on. Redknapp, meanwhile, appears to be preparing his third and final substitution.
RED CARD! O'Neil is given his marching orders as referee Mason makes a big call. Russell escapes from his man and looks to burst through on goal, but he is brought down by a scything tackle from O'Neil just outside the area before he can get a shot away. It is a terrible foul but the decision facing the referee is whether any of the other defenders could have got back to prevent a clear goalscoring chance, and he decides O'Neil has to go and shows him a straight red card.
QPR are suddenly enjoying a purple patch, as Hoilett terrorises Forsyth down the wing yet again and plays the ball on to Austin, whose wild shot from distance goes high and wide.
QPR carve out their best chance of the afternoon as Traore cuts the ball back for Austin, whose first-time shot from 12 yards is uncharacteristically scuffed and trickles just wide of Grant's left-hand post.
Hendrick's determination pays dividends as Onuoha is forced to give away yet another corner, but this time QPR are able to get it clear and Hoilett temporarily holds up play to give them some respite.
Derby win a couple of corners in quick succession as they continue to ask questions of QPR, but Dunne is a reliable last line of defence and makes a couple of vital blocks to keep McClaren's side at bay.
Derby nearly get behind the QPR defence for just about the first time, but Dunne makes a last-ditch tackle to take the ball away from Russell and concede a corner.
Thorne has been impressive all afternoon and he gets his way out of a tight spot with a mixture of skill and strength.
Derby are applying some pressure now in the early stages of the second half, roared on by the fans sat behind Green's goal.
Ward links up well with Hughes down the Derby left before stretching out to send in a cross, but there is nobody in the centre and the ball flashes across the six-yard box.
QPR kick us off in the second half, with the sun now shining at Wembley. There have been no changes at the break.
The half-time whistle goes and it remains goalless after a tense first half at Wembley. Derby have had the better moments, with a strong penalty shout by Hughes waved away and Green saving well from Ward's free-kick, but QPR have also looked a threat at times and there is everything still to play for after the interval.
Thorne dispossesses Doyle with a challenge which sends the QPR forward tumbling but is perfectly-timed just outside the Derby area.
Traore leads a swift QPR counter-attack but then seems uncertain what to do as he approaches the Derby box and drags a weak shot wide of the far post when he should have done far better.
A clever piece of skill from Hughes lays the ball off to Ward and he tries to slip it down the left-hand channel for Martin, but Dunne reads the situation expertly to get across and make the interception.
Ward is upended by Onuoha 25 yards out and curls in a delightful inswinging free-kick which is missed by everyone in the centre but looks set to creep in the corner before Green gets down smartly to his left to make an excellent save.
Buxton steps in with another good challenge on Hoilett before a couple of crunching tackles in midfield result in a QPR free-kick. The referee has yet to issue a yellow card and seems to be giving the players just a bit of leeway on such a big occasion.
Russell's shot from distance is partly blocked by a defender, as the pace comes off the ball and it loops harmlessly into Green's arms.
Hoilett has looked QPR's most dangerous attacking outlet and another strong run down the left takes him into the area, but Buxton helps out Forsyth to make an important tackle.
Simpson tricks his way past a couple of defenders on the left and Hughes then picks up the ball, curling a shot high and wide from the edge of the area.
Kranjcar gestures to the QPR bench that he has picked up a knock and Redknapp prepares to bring on Traore in his place.
QPR are sitting deeper now as Russell threatens down the left before delivering cross which is scrambled away.
Derby are really clicking into gear now, as Ward surges through from midfield before firing off a shot from 25 yards which deflects wide for a corner.
Hughes races into the area and cuts back inside Dunne before going to ground. He screams for a penalty but the referee is having none of it and replays show it was a tough call. There appeared to be some contact from the QPR defender's arm but Hughes seemed to go down very easily.
It has been a tight match so far, which is not surprising given what is at stake, but there are just signs that Derby are starting to settle as their passing begins to look more fluent.
Ward does well to win a corner for Derby and takes the cross himself. It is cleared straight back out to him and he sings a dangerous ball to Forsyth at the back post, but the full-back can only direct his header over the bar.
A QPR attack breaks down and Derby think for an instant that they have a chance to counter-attack, but Redknapp's side are back into their shape as quick as a flash.
QPR will want to get Hoilett on the ball at every opportunity, as the winger again commits his defender before sending in a cross which ricochets away to safety.
Thorne goes up for an aerial challenge and stays down for a brief moment as he lands awkwardly. Referee Lee Mason halts play but Thorne is fine to carry on and the game resumes with a dropped ball, which is uncontested and kicked back to Green.
Barton goes for goal from at least 35 yards but the quality of the strike does not match his ambition as it is blazed high and wide.
Derby are seeing more of the ball at the moment but QPR are very organised and it will be difficult to pick holes in their defence.
Keogh brings down Austin 25 yards from goal but Barton's free-kick is no better than the earlier one from Derby, as it flies straight into the defensive wall.
Forsyth whips in a cross from the left in an attempt to pick out Martin in the centre, but it is just too heavy and there have still been no alarms for either keeper.
Austin is fouled by Buxton in midfield to give QPR a free-kick and a chance to send their big men forward, but the delivery is disappointing.
A long ball is flicked on to Austin but he is unable to keep it inside the touchline following a poor touch and there are ironic cheers from the Derby supporters.
Both teams are looking to be positive early on as Russell drives down the left wing before delivering a poor cross which floats straight out of play.
The corner comes to nothing but QPR keep up the pressure as Austin tries his luck with a ferocious strike from distance which flies over the crossbar.
Hoilett is never shy to run with the ball and he does well down the right before Forsyth sticks out a leg to make a well-timed tackle and concede a corner.
Russell steps up to take the set-piece but crashes his shot straight against the defensive wall and QPR are first to the loose ball to get it clear.
Russell glides across the wet Wembley turf on a wonderful run from the right before Hughes is brought down by a clumsy challenge from O'Neil to give Derby a free-kick in a central position 25 yards from goal.
Derby have received plaudits for their attractive brand of football this season and QPR seem intent on closing them down quickly and denying McClaren's side any time to settle on the ball.
Austin tries to play in Doyle down the right wing for QPR but Buxton gets across quickly to make a strong tackle and earn the applause of the Derby fans.
Derby threaten down the right from the kick-off but Hughes loses the ball as his control lets him down and he has to track back to slide in with an early challenge.
Derby get the game started, and let us hope for an exciting encounter as these two teams play off for a place in the Premier League.
The players emerge from the tunnel as the rain comes down at Wembley, but it will take more than miserable weather to dampen a fantastic atmosphere.
Kick-off is just a few minutes away and both managers have been speaking on the television ahead of the game. They both sound in confident mood, with McClaren saying Derby are relaxed and the pressure is on QPR. Redknapp insists his men are ready and is anticipating 'a real good game'.
Both teams are unchanged from their semi-final second-leg victories, meaning that Niko Kranjcar is fit to play for QPR after recovering from a hamstring problem but Benoit Assou-Ekotto remains sidelined with a knee injury. For Derby, Craig Bryson, who was named in the PFA Championship Team of the Year alongside Will Hughes, is among the substitutes after shrugging off a back problem.
Chris Green from Huddersfield is the first to get in touch, saying: "Derby to win 3-1, with Thorne and Martin (2) scoring the goals."
Derby: Grant, Wisdom, Keogh, Buxton, Forsyth, Hendrick, Thorne, Hughes, Russell, Martin, Ward. Subs: Bryson, Eustace, Sammon, Legzdins, Whitbread, Dawkins, Bamford.
QPR: Green, Simpson, Onuoha, Dunne, Hill, Doyle, Barton, O'Neil, Hoilett, Austin, Kranjcar. Subs: Traore, Morrison, Yun, Hughes, Henry, Zamora, Murphy.
Derby negotiated their semi-final with far more breathing space, running out 6-2 aggregate winners against Brighton. They challenged for automatic promotion before finishing the Championship campaign in third and McClaren has urged his young players to keep calm and reproduce the type of performances they have done all season. There was not much between today's rivals when they met earlier in the season, with Derby winning 1-0 at home on February 10 and QPR triumphing 2-1 at Loftus Road on November 2.
Redknapp has insisted that QPR are the underdogs despite their higher wage bill and superior spending power. He has a squad packed with Premier League experience but QPR did finish five points behind Derby in fourth place. They had to fight hard to get past Wigan in their play-off semi-final, winning the second leg 2-1 after extra-time following a goalless draw in the first game at the DW Stadium.
One of the main duels will, of course, be the tactical battle of wits between managers Steve McClaren and Harry Redknapp, and there has been a lot of focus on both men ahead of kick-off. A lot has been made of the fact that this is McClaren's first return to the Wembley dugout since that night (and that umbrella) against Croatia seven years ago when England missed out on a place at Euro 2008. He has repaired his reputation somewhat since that evening and now has a chance to lead Derby back to the Premier League for the first time since 2008. QPR only came down a year ago and Redknapp's position will reportedly be under threat if they do not win this afternoon.
Let us know your views and predictions ahead of the match by getting in touch at Lewis.Rutledge@bskyb.com, or via Twitter @Rutledgetwit. Who do you think will come out on top and what kind of match are you expecting? The full team news will be in shortly but who do you reckon will be the key players?
Dubbed the 'richest game in football', the winners of today's contest are in line for a windfall of at least £100million for going up to the top flight. Pressure does not get much more intense and it is always one of the highlights of the season as two teams who have performed so well go head to head, knowing that at the end of the afternoon the emotion will be either ecstasy or agony.