The 54-year-old Italian who has been out of job since leaving Inter Milan in 2014 has spent parts of the last past two years in England, learning English.
He has been confirmed as the new manager to replace Quique Sánchez Flores who departed Vicarage Road at the end of the 2015/2016 season after leading the Hornets to a 13th place finish at the just concluded 2015/2016 season. A statement on Watford's (@WatfordFC) twitter handle reads;
Mazzarri who is to resume his new position from July 1st has a rich coaching experience already with four years at Napoli, where Valon Behrami and Miguel Britos, now at Watford, played for him. Also he had spells at Pistoiese, Livorno, Reggina and Sampdoria. His preferred formation is the 3-5-2 system.OFFICIAL: #watfordfc confirms it has reached agreement with Walter Mazzarri to become Head Coach from 1st July 2016. pic.twitter.com/ExNAAxYnHK— Watford FC (@WatfordFC) May 21, 2016
He will be the fourth Italian coach in the English Premier League next season, joining Claudio Ranieri (Leicester City), Antonio Conte (Chelsea) and Francesco Guidolin (Swansea).
Expect to see a dramatic coach when the season begins as we present you pictures of some of his touchline antics and celebrations below.
