He will no doubt receive a warm welcome from the Leicester faithful, but Watford fans will be hoping that the niceties do not extend onto the pitch, with Leicester currently three games without a win in the Premier League.
Watford on the other hand, come into the match on a massive high and seeking back-to-back Premier League victories for the first time this season after thrashing Manchester United 4-1 at Vicarage Road last Saturday.
There is some positive news for the Foxes though, with Jonny Evans expected to feature despite a thigh problem.
Watford will also be missing some key players, none more so than Senegalese winger Ismaila Sarr, who picked up a knee injury after a heavy tackle by Donny van de Beek in last weekend's victory over Manchester United.
Managers have their say
In their pre-match press conferences, both Brendan Rodgers and Claudio Ranieri discussed Ranieri's return to Leicester and his achievements whilst Manager at the club. Here is what both had to say on the matter.
"What that gave was the hope that it can be done and it’s possible to do it. That gave belief not just to Leicester but to every club.
"That story is iconic and his association with Leicester, they have a bond forever." Rodgers added.
Watford Head Coach Claudio Ranieri: "The job give to me good emotion, good emotion, and I'm very proud to be part of the Leicester fairytale and the history of the football, very happy."
"The fans from the beginning in the early days they stay with me, it's is unbelievable and I want to thank you (them) again once.
"I'm very honest it will be a big emotion from the beginning and after the match, (but) during the match I know I'm an opponent and I try to do that my best." Ranieri added.
Leicester City predicted XI: Schmeichel; Thomas, Soyuncu, Evans, Castagne; Ndidi, Soumare, Maddison; Barnes, Lookman, Vardy.
Watford predicted XI: Foster; Masina, Troost-Ekong, Cathcart, Femenia; Louza, Sissoko, Cleverley; Cucho Hernandez, Dennis, King.
Player's to watch
Reputation precedes Jamie Vardy at this stage of his career and the forward enjoys playing against Watford.
Vardy has scored in each of his last three Premier League home matches against the Hornets, with all three coming from the penalty spot.
Vardy already has seven Premier League goals to his name so far this season, but hasn't scored in his last four appearances in the league. Something he will hope to put right on Sunday afternoon.
Having signed for Watford in the summer for a reported fee of £3-4 million pounds, Emmanuel Dennis has proved an incredible bargain for Watford so far this season.
Watford will certainly be looking for him to do so, given the absence of Ismaila Sarr.
Leicester City vs Watford is a 2pm kick-off on Sunday, 28th of November.
The game can not be watched live on television in the United Kingdom.