Hull CIty booked their place at Wembley after downing Sunderland 2-0 in the FA Cup Sixth Round at the KC Stadium
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Jose Ulloa pulled a goal back for Brighton at Hull with this glancing header.
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Another mix-up at the back for Brighton cost them dearly in the 35th minute when Robert Koren's deflected free-kick found its way into the back of the net.
Defender Curtis Davies gave Hull the lead against Brighton in the FA Cup fifth round replay with this scrappy effort from a corner.
The home side have since doubled their lead through Robert Koren.