The outgoing Chelsea manager has been confirmed by club president Aurelio De Laurentiis as the replacement to Walter Mazzarri at the Stadio San Paolo.
Despite finishing second in Serie A, Walter Mazzarri parted ways with the Partenopei and, until Friday's tease from the owner, who would replace him in the Stadio San Paolo was up in the air.
However, De Laurentiis has ended the speculation by revealing that the outgoing Chelsea boss - who helped the Blues lift the Europa League trophy this season - will soon step into Mazzarri's shoes on a two-year deal.
He told Sky Sport Italiaon Friday: "I've given myself a birthday gift, I've signed Benitez. I'll make it official in the next few days as Benitez needs to end things with Chelsea.
"He'll have a two-year contract, no longer. We need to get to know each other first, then we'll see."Despite achieving continental glory with the Blues and securing a Champions League spot by finishing third in the Premier League, the former Liverpool boss is not expected to remain in charge at Stamford Bridge.
Instead, Jose Mourinho is expect to make a return to Chelsea - with Real Madrid having confirmed he will leave this summer - and Mazzarri's departure opens the door for Benitez to return to Serie A, which he left in 2010 after an unsuccessful spell at Inter.
One of the former Inter trainer's immediate concerns would be ensuring that star striker Edinson Cavani stays at the Neapolitan club or, if the Spaniard is unable to convince the Uruguayan to stay, then he will want an adequate replacement in attack.