Leicester edged Brighton on penalties to reach the Carabao Cup quarter-finals after an entertaining game finished 2-2 at the King Power Stadium.
Neal Maupay's penalty hit the crossbar and Enock Mwepu's effort was saved by Danny Ward to send the Foxes through.
Harvey Barnes had opened the scoring early on before a dramatic end to the first half saw two goals in added time.
Adam Webster poked in but Ademola Lookman put the Foxes back in front, before Mwepu levelled again on 71.
It was the midfielder's first goal for the Seagulls, as he looped a header into the corner - but the celebrations turned to disappointment after penalties.