Shittu hails back four - The SunDanny Shittu is the Lions' immovable object - but the big defender reckons Millwall are moving on up.
And centre half Shittu insists Millwall's rock solid back four, currently missing club captain Paul Robinson, can help take them into the top two.
He said: "There's lots os competition in every position, even without Robbo. All compliments to the lads, we had to defend and contest.
It feels good to be in the Play-Off places now and we definitely believe we can finish up there and get automatic promotion or a play-off place."
Lions boss Jackett was full of praise for Shittu's performance.
he said: "He's been a key player for us since he's come back because he didn't join until after pre-season. He played a captain's role."
Sub Chris Taylor's second-half strike propelled the Londoners in to the play-off placed and a point behind Leicester.
the Lions bounced back after sinking to a 3-0 defeat at Ipswich last week, which ended a 13-game unbeaten run stretching back to September.
But in the opening 20 minutes it looked as though Shittu and company were in for a long afternoon as the Foxes piled forward.
Centre-half Mark Beevers had to throw himself at Andy King on 10 minutes to block the Leicester midfielder's goal-bound strike.
David Nugent could have claimed his 12th of the season in the 38th minute but his back-post volley was saved by the legs of Millwall keeper David Forde.
Winger Taylor's introduction for Scott Malone after the break put Millwall on the front foot.
And the home side made the pressure count on 67 minutes when Liam Trotter linked up with sub Andy Keogh, who had been on the pitch only a minute.
Trotter slid in a cross from the byline for Taylor to easily convert from a few yards.
Leicester toiled in search of an equaliser but could only muster a 20-yard strike on 95 minutes from skipper Wes Morgan which Forde comfortably gathered.
Foxes boss Nigel Pearson said: "In the first half we performed pretty well and in the second half they had a higher tempo.
We made too many unforced errors in that opening 15 minutes of the second half - and we've let runners go for goal."