And that's it! A tremendously entertaining game football packed with incident draws to a close and it is Chelsea who march onto Wembley where they will meet either Tottenham Hotspur of Sheffield United.
Chelsea 1-0 Liverpool (2-1 aggregate)
Rickie Lambert visualises his superstar moment as he picks the ball up on the edge of the box and tries to bend one into the top corner, but instead whacks it horribly over the bar. One minute remaining.
Costa again wins a free kick and plays it quickly to free Hazard. It's three on three as Chelsea chase a second but they waste the chance with Liverpool clearing. Mourinho makes his last change with Didier Drogba coming on for Willian.
Costa has been as underhanded as they come this evening but has still managed to be brilliant. This time he leads a counter before cleverly clipping the ball away from Skrtel, but is cleaned out through a shoulder barge from the Liverpool centre half.
The free kick comes to nothing as Skrtel is penalised but Liverpool keep up the pressure with Lambert forcing a ball across goal that Courtois comes out to collect, but then decides against. Balotelli picks it up near the byline on the left but inexplicably tries to curl onto into the far corner! It doesn't, as you might have guessed, and the chance is gone.
Emre Can bursts down the right and tries to power his way through two blue shirts. He goes down, and wins a free kick in an identical position from which Chelsea scored...
Almost immediately after the restart, Costa drops deep and springs Ramires down the inside right channel. As he enters the box however the Brazilian checks back and Johnson gets a foot in to disrupt the move.
And we are back underway for the final 15 minutes. Rickie Lambert has come on for Alberto Moreno.
HALF TIME IN EXTRA TIME
Chelsea 1-0 Liverpool (2-1 on aggregate)
Gerrard robs the ball from Costa, prompting another bit of aggro involving the Spanish striker. Michael Oliver responds by booking the pair of them.
What a chance for Henderson! Sterling jinks his way down the left towards the byline and clips a delightful ball across to Henderson whose coming in at pace but his header is wide. What an opportunity.
Chelsea may lead, but the gameplan remains the same for Brendan Rodgers. Liverpool still need to score to push this to penalties.
Chelsea finally have the lead! Willian whips that free kick in from the right where Ivanovic pops up unmarked to plant a firm header into the back of the net.
Goal! Chelsea 1-0 Liverpool (Branislav Ivanovic, 93)
Lucas sticks a lazy hanging leg out and brings down Hazard. Mourinho is furious the Brazilian hasn't been shown a second yellow.
Brilliant again from Coutinho, who takes a ball out of the air while rushing into the box before hooking it back to Sterling who slides across to Balotelli. The Italian races onto it but displaying fairly awful technique, leans back and whacks one over the bar.
And we are back underway. Surely something has to give in extra time?
30 minutes of extra time it is, then. If things remain they way they are after that, Chelsea are through.
END OF 90 MINUTES
Chelsea 0-0 Liverpool
Matic drives a low effort on goal but a deflection takes it out for a corner. Chelsea wouldn't mind a late winner, what with the small matter of Manchester City awaiting them on Saturday.
The free kick is wasted by Gerrard but Henderson chases it down and forces a corner. Another ball comes into the box but Willian takes it down and hoofs clear. Into four minutes of added time.
Sterling now leaves Ivanovic for dead down the left and his hauled down for his trouble. Liverpool free kick.
Henderson finds Sterling with a wonderful cross-field ball on the edge of the box, but after cutting inside onto his right foot the forward whacks his shot over the bar.