Little doubt that Brighton will have to throw themselves forward now, while Derby fans might just - just - start dreaming of a trip to Wembley.
Derby pressing hard for the goal that you'd have to think would seal the tie and a place at Wembley. Will we see a response from the Seagulls?
Big save by Lee Grant to keep Brighton out!
Grant rushes off his line to deny Ulloa. Remains 1-0 on the night.
There will be a minimum of two minutes of added time at the end of the first half. Derby lead Brighton by a goal to nil at the iPro, giving them a 3-1 aggregate lead in the tie.
HALF TIME: Derby County 1 Brighton and Hove Albion 0 (agg 3-1)
Brighton substitute Adam Chicksen picked up a yellow card just before the whistle blew for the end of the first half.
And we're off in the second half at the iPro Stadium in Derby. Brighton need two goals if they are to keep their promotion dreams alive and force extra time. Who'll step up?
GOAL! Derby score again and look to have sealed their place at Wembley!
Change for Derby County...
GOAL! Derby make it three on the night! They're going to Wembley!
Cracking finish from Thorne!