Town outclassed us on that December day last season. Live on television, they won 3-0 and the display led then boss George Graham to apologise to travelling fans.
"I remember it well," said Ledley. "It was around Christmas time, it was cold and they got the better of us that day. We didn't perform well at all.
"But we play them this time with what happened on the pitch that day totally out of our minds."
How things have changed. A year on and the good times have returned to Lane under Glenn Hoddle, we are being praised for playing some of the most attractive football in the Premiership and, most importantly, the results are there for all to see.
How has it happened? "The manager has brought in five or six top-class players and that has shone through the team," explained Ledley.
"Their quality is helping to bring the best out of the youngsters at the club and the competition is so fierce, that's another thing.
"There is a buzz around the place and we look forward to every game.
"When we're training we're all buzzing, we play good football and we try to take that out onto the pitch with us. That is what we are encouraged to do.
"People are talking about us in the shake up and that's what we wanted.
"We said it might take a few seasons to happen but all of a sudden people are talking about us this season.
"We've got to keep that going and try to finish it off by finishing in a European qualifying position, keep building and moving on."
Ironically, Town have gone the other way and although the stylish football that led them to fifth place in the UEFA Cup is still there, they have won just once in the league are currently four points adrift at the bottom and desperately needing points.
But Ledley is all-too aware of the dangers of taking Saturday's game for granted. "Ipswich are always a tough side to face," he added.
"They play good football as well but the way we've been playing at home we'll be confident and looking for the three points."
Ledley King clealry remembers the last time we played Ipswich Town - thankfully, the form we showed back then is now no more than a distant blur.