Inzaghi signed a two-year deal after Al-Hilal lured him with an offer of reportedly more than 20 million euros ($A35 million) per season.
“The Italian genius is here,” the Saudi club said in a social media post.
In an interview on the club’s website, Inzaghi said his aim was “to win as much as possible, to win trophies, because it is the most important thing”.
“And then I hope to apply my way of playing and make the team play in the best football,” he added.
Inzaghi promised that his side would play with “speed, aggression and determination”.
Inter were routed 5-0 by Paris Saint-Germain in the Champions League final last Saturday, marking the most lopsided defeat in the 70-year history of major European finals.
The 49-year-old Inzaghi coached Inter to the Serie A title last year and was also in charge when the Nerazzurri lost the 2023 Champions League final to Manchester City.
He was at Inter for four years.
Al-Hilal open their Club World Cup campaign against Real Madrid on June 18 at Hard Rock Stadium in Miami Gardens.
AAP/ANSA