David Nugent scored the winner as Leicester beat Premier League side Norwich City to advance to the quarter-finals of the FA Cup.
The Foxes took a shock lead in the fifth minute.
The third of Ben Marshall's successive corners met the head of Sean St. Ledger, the Irish defender crisply steering the ball past Norwich's second choice 'keeper Jed Steer.
Paul Lambert's side were ahead 17 minutes later.
Leicester goalkeeper Kasper Schmeichel barged into Elliott Bennett and referee Mike Dean pointed to the spot.
Wes Hoolahan stepped up and, while Schmeichel saved the penalty, he could do nothing about the Irishman's rebound.
Norwich should have taken the lead early in the second half, but Bennett saw his goalbound shot cleared off the line by Richie Wellens.
Leicester, however, were showing the greater industry and won the game when Jermaine Beckford flicked the ball on and Nugent stepped inside defender Barnett far too easily before slotting a precise right-foot shot past Steer.