"Cristiano Ronaldo is staying at @AlNassrFC until 2027," the club wrote in a post on X.
Minutes before the official confirmation, the team posted a teaser video, with the 40-year-old Ronaldo walking along a beachfront and saying: 'Al Nassr forever'.
The Portuguese superstar arrived in 2023 in the kingdom to play with the club, heralding a rush of players in the latter stages of their careers to the oil-rich country.
Last month, he sparked rumours of a departure when he posted 'This chapter is over' hours after the Saudi Pro League wrapped up with Al Nassr finishing third and trophyless once again.
However, those rumours have now ended.
"Ronaldo's presence is a key factor in developing the Saudi league in the last two years and a half. He opens the door for elite and young players to come to Saudi Arabia," a source from the Public Investment Fund (PIF), a major investor in Saudi football, told AFP last month.
The oil-funded PIF, the sovereign wealth fund behind a number of big-ticket Saudi investments, controls a group of Pro League clubs including Al Nassr, Al Hilal and Al Ahli.
Although Ronaldo was the Pro League's top scorer last season with 25 goals, he has been unable to win a Saudi or continental trophy with Al Nassr, who lost in the Asian Champions League semi-finals last month.
Saudi Arabia has shaken up football by spending heavily on stars from Europe, starting with Ronaldo's move in late 2022, and the desert nation will host the World Cup in 2034.
For the past two years, Saudi football fans could watch the likes of Ronaldo and Karim Benzema, with six Ballons d'Or between them, on any given weekend during the football season in the kingdom.
However, the oil-fuelled Saudi football project has drawn comparisons with the Chinese Super League, which imported players on exorbitant salaries until team owners went bust as the Chinese economy fizzled.
But with Saudi Arabia set to host the 2034 World Cup, and desperate to re-model itself as a tourism and business magnet before global oil demand falls for good, there is probably more to come from the Pro League.