Ole Gunnar Solskjaer's Reds have been handed a home draw against the League One side, who knocked Carlisle United out in round two, to reach this stage for the first time since 2011.
The two clubs have only met once in our history, with United winning 2-0 in an FA Cup tie back in 1986, thanks to goals from Mark Hughes and Frank Stapleton.
Wolves v Reading
Oxford United v West Ham United
Watford v Swansea City
Brighton & Hove Albion v Aston Villa
Sheffield United v Sunderland
Colchester United v Tottenham Hotspur
Portsmouth v Southampton
Burton Albion v Bournemouth
Preston North End v Manchester City
Milton Keynes Dons v Liverpool
UNITED v Rochdale
Luton Town v Leicester City
Chelsea v Grimsby Town or Macclesfield Town
Sheffield Wednesday v Everton
Arsenal v Nottingham Forest
Crawley Town v Stoke City
WHEN WILL THE GAME TAKE PLACE?