Ademola Lookman scored his first Leicester goal as they beat Millwall in the Carabao Cup third round.
He pounced from eight yards out after Kelechi Iheanacho's 20-yard shot had been parried by keeper George Long, Leicester's first shots on target.
Iheanacho sealed the win as he ran on to a ball down the right wing, cut in and curled home.
Brendan Rodgers' Foxes host fellow Premier League side Brighton in the fourth round.
Millwall had several chances in Wednesday's defeat with Ryan Leonard missing, Connor Mahoney forcing a save and Ben Thompson heading over.