A VAR-y entertaining nightpublished at 23:14 Greenwich Mean Time 17 January 2018
No sign of Antonio Conte yet and we're going to have to wrap things up.
Keep your eye on the BBC Sport website for all the reaction.
What a night!
Blues go through 5-3 in penalty shoot-out
Pedro & Alvaro Morata see red in extra-time
Willian has extra-time penalty call turned down by referee
Wigan shock Bournemouth & Swansea beat Wolves
Gary Rose
No sign of Antonio Conte yet and we're going to have to wrap things up.
Keep your eye on the BBC Sport website for all the reaction.
What a night!
Chelsea 1-1 Norwich (5-3 on pens)
Norwich City
Norwich manager Daniel Farke speaking to BBC Sport: "To be honest it's big disappointment, some of the lads are sitting with tears in their eyes in the dressing room. It was a brilliant performance from us and we were so close to winning against the current Premier League champions. I can't praise my lads for their attitude and this performance enough, it's a shame we aren't in the next round, but I'm so proud of my lads.
"I think in general it was a brilliant performance, definitely, we defended well as a team, and we created chances, we hit the post and the bar, so we were close. We showed that when we are at our best we can play with the best teams, so the lads can be confident. But, it won't help us in the next game, and now, we just have to stay concentrated in the league."
On VAR decisions: "I don't want to criticise the referees, because they were on the other side to the incident and they were some really tough decisions to make. It is how it is, there are mistakes in football, players make them, managers make them, and referees make them, it is how it is."
Chelsea 1-1 Norwich (5-3 on pens)
Right, let's see what managers had to say.
First up, the Norwich boss.
And finally, here's Chelsea's winning moment.
Classy from Eden Hazard as he sends Angus Gunn the wrong way to set up a fourth round tie against Newcastle for Chelsea.
And in the other game, Jordan Ayew and Wilfried Bony scored in either half as Premier League strugglers Swansea beat Championship leaders Wolves in their FA Cup third-round replay.
While we wait to hear from the Chelsea and Norwich managers, check out some highlights from the other games tonight.
First up, League One leaders Wigan produced an FA Cup third-round shock as they claimed a deserved victory over Premier League Bournemouth at the DW Stadium.
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#bbcfootball, #bbcfacup or text 81111
Lifa: That red card is a blessing in disguise for Alvaro Morata. He needs to regroup. He's been terrible these last few games.
Shamsheer: Willy Caballero saved Chelsea today. Another poor performance and it's worrying for us. Wake up board.
And another.
Did Alvaro Morata dive?
Plenty of talking points from tonight's game and this was one of them.
Was Graham Scott right to send Pedro off?
Chelsea 1-1 Norwich (5-3 on pens)
Alan Shearer
Former Newcastle striker on MOTD
It was a magnificent game, very entertaining, and a lot of talking points.
I don't think we can sum it up any better, Alan...
#bbcfootball, #bbcfacup or text 81111
Ryan: What. A. Match!
Tony: Well, Norwich played out of their skins, Chelsea played poorly, went down to nine men and still won. That's football.
Chelsea 1-1 Norwich (5-3 on pens)
Chelsea forward Eden Hazard: Now we can focus on the league and get ready for the next game against Newcastle.
It is the FA Cup it is not easy to win the game. We gave everything, at the end of the game we played 9 v 11 so we showed great character. We are happy but also sad that we lost two players.
Antonio Conte finally has a smile on his face after an eventful night comes to an end.
It took a while, and a fair few nervous moments, but Chelsea are into round four.
Chelsea 5-3 Norwich
CHELSEA GO THROUGH.
Never doubt Hazard, who ends a dramatic, sapping night for Chelsea in positive fashion.
Chelsea 4-3 Norwich
Nerves? What nerves? Murphy fires his shot into the top corner to keep City in it.
Chelsea 4-2 Norwich
Kante maintains the home side's 100% record with a rising shot that beats the dive of Gunn.
Chelsea 3-2 Norwich
A fine spot-kick. Left-footed and in to the left side of Caballero's net.
Chelsea 3-1 Norwich
Three out of three for the Blues as Azpilicueta matches Luiz.
Chelsea 2-1 Norwich
Rolled into bottom right corner of Caballero's goal.