Postpublished at 19:24 Greenwich Mean Time 28 January 2019
Swansea City v Barnet/Brentford
In-play clips of Barnet v Brentford available to UK users only
Coulthirst scores twice for Barnet after Watkins' opener for Brentford
Watkins goes down despite little sign of contact, Maupay scores from spot
Canos restores Brentford lead before sub Sparkes curls in superb free-kick
Winner goes to Swansea in fifth round
Neil Johnston
Swansea City v Barnet/Brentford
Chelsea v Manchester United
Wow...
Middlesbrough/Newport County v Manchester City
Doncaster Rovers v Crystal Palace
AFC Wimbledon v Millwall
Bristol City v Shrewsbury/Wolves
Here we go...
Ready for the draw?
We're moments away...
#bbcfacup
Sahil Loomba: As a Watford fan, wouldn't mind anyone at home except United, City and Chelsea! We will deal with one of them in the final!
We're less than 10 minutes from the draw. Here's the all important numbers to look out for:
1 Swansea City
2 AFC Wimbledon
3 Shrewsbury Town or Wolverhampton Wanderers
4 Millwall
5 Brighton & Hove Albion or West Bromwich Albion
6 Bristol City
7 Derby County
8 Doncaster Rovers
9 Chelsea
10 Watford
11 Middlesbrough or Newport County
12 Manchester City
13 Barnet or Brentford
14 Portsmouth or Queens Park Rangers
15 Manchester United
16 Crystal Palace
Will a team from outside the Premier League win this season's FA Cup?
West Ham were the last team outside the top-flight to win the competition in 1980 - a 1-0 victory over Arsenal.
No one else has managed it since but with 13 Premier League clubs already out, is that about to change?
SchwabenScouser: Millwall v Chelsea. Steve Morison vs Gonzalo Higuain. No trophy Harris v no trophy Sarri. Tasty.
BBC One
Mark Chapman is getting ready to present the draw - and you can watch the whole thing live on The One Show - which is under way now - on BBC One and the BBC Sport website.
Joining Chappers is two-time Arsenal FA Cup winner Ian Wright and former Arsenal and England player Alex Scott, a seven-time Women's FA Cup winner.
The draw is due to start in about 20 minutes.
Barnet v Brentford (19:45 GMT)
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Barnet v Brentford (19:45 GMT)
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New goalkeeper signing Will Huffer goes straight into the Barnet team after signing on loan from Leeds United.
Shaquile Coulthirst, who scored the winning goal at Sheffield United in the third round, also starts.
#bbcfacup
Matthew Wheeler: As a Donny fan I'm torn between a big Premier League team or an easier draw in the hope of getting through to the quarter-finals.
Phil Thomas: I want Man Utd again but will get Wimbledon away - Bristol City fan.
Busy weekend? Missed the best goals?
Feast your eyes on this. It includes an absolute corker from Swansea's Bersant Celina.
#bbcfacup or text 81111
Who fancies Manchester United at Doncaster Rovers or Chelsea at AFC Wimbledon?
Let me know who you want in the draw - and why!
Hurry. We'll know who plays who in just over half an hour.
Tweet #bbcfacup
There are 21 teams in the hat for the fifth round - only 16 will get to play in it.
Definitely through: Manchester City, Watford, Manchester United, Crystal Palace, Chelsea, Derby County, Swansea City, Millwall, Bristol City, Doncaster Rovers and AFC Wimbledon.
Fourth-round replays: West Bromwich Albion v Brighton & Hove Albion; Newport County v Middlesbrough; Queens Park Rangers v Portsmouth; Wolverhampton Wanderers v Shrewsbury Town.
Still to play: Barnet v Brentford.
We've had shocks, broken corner flags,, externaltantrums and a flurry of Premier League clubs booted out.
Just five top-flight teams - including holders Chelsea and reigning Premier League champions Manchester City - are definitely through after an action-packed weekend of FA Cup action.
Will non-league Barnet produce another sting in the tail by beating Championship Brentford - who are also nicknamed the Bees - in the 16th and final tie of the fourth round?
Full text commentary of that from 19:45 GMT.