Ranieri has signed a two-year deal at Vicarage Road following the departure of Xisco Munoz, who became the first Premier League managerial sacking of the season on Monday (AEST).

Under Munoz, the Hornets won their first game on their top-flight return against Aston Villa but only managed to pick up four points from the next six games to leave them in 15th.

However, new appointment Ranieri is no stranger to English football having enjoyed spells with Chelsea and Fulham, while overseeing the most unlikely of title-winning terms with Leicester City.

The Foxes secured the title in 2015-16, led by the likes of Riyad Mahrez, N'Golo Kante and Jamie Vardy as they lost just three times all season under the Italian's stewardship.

Despite the triumph, Leicester and Ranieri parted ways the following season with the defending champions just a point above the relegation zone with 13 games left to play.

He then returned to take charge of Fulham in 2018, via a stop at Nantes, but was sacked after just 106 days in charge, with the Cottagers heading for an imminent relegation from the Premier League.

The former Chelsea manager's most recent job was with Sampdoria, but he departed in the close-season after a two-year spell with the club, having initially taken charge in 2019.

Watford, who have now hired six and fired five different permanent head coaches since Marco Silva's departure in January 2018, become Ranieri's 21st club in his 35-year career.

He will be joined by assistant coaches Paolo Benetti and Carlo Cornacchia, as well as fitness coach Carlo Spignoli, as he prepares for the difficult task of the unbeaten Liverpool in his first game on October 16.