The draw for the fifth round takes place on Monday, 30 January live on The One Show on BBC One from 19:00 GMT.
The FA Cup final will take place at Wembley on 3 June, six days after the Premier League season ends and a week before the Champions League final.
I've just seen the line-ups. Strong but not the first XI for either side.
Full team news on its way soon.
Only 11 of the 20 Premier League made it through the third round.
At least two more top flight clubs will go out this weekend.