Monza and Bernie Ecclestone have finally signed on the dotted line of their race contract extension.
After a long-running saga, the 2017-19 deal was actually agreed in September but actual signatures on the documents were missing until now.
Monza's official Twitter account announced on Tuesday that the deal is now "signed".
"The Italian GP remains at Monza for the next few years," it declared.
Italian media reports quoted Italian Olympic chief Giovanni Malago as saying: "I am really happy with this great result.
"Without the careful and stubborn work of [Italian automobile club] president Angelo Sticchi Damiani, Italy would have lost its grand prix."
Nico Rosberg clinched the 2016 drivers' championship after finishing second in Sunday's Abu Dhabi Grand Prix.