The FA Cup semi-final draw took place on Sunday.
Manchester City will take on Sheffield United, while Brighton will face either Manchester United or Fulham.
City advanced to the fourth round with a 6-0 victory over Burnley on Saturday.
On Sunday, the Blades defeated Blackburn 3-2 to secure their place.
Brighton defeated League Two Grimsby 5-0 to halt their fantasy journey to the last eight.
Both semi-finals will be held at Wembley Stadium on April 22-23.