The Republic of Ireland boss signed a new contract that will take him to the European Championship in 2024.
The 50-year-old's contract was due to expire in July but both parties had remained confident of striking a new deal.
After succeeding Mick McCarthy, Kenny has lost one of his last 10 games as national team boss.
New deals have also been given to Kenny's assistant and backroom staff.
Kenny said that he was delighted to extend his contract and that he considered it the ultimate honor to manage his country. In recent performances we have seen a strong connection between the team and the Irish supporters, as the players are incredibly proud to play for Ireland.
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The attitude of the players has been exceptional, we have seen the team grow and develop, and I, along with the staff, look forward to seeing the team fulfill its potential. I want to acknowledge the importance of the passionate Irish fans both home and away with the recent return of supporters to stadiums. I want to thank Jonathan and the Board of the FAI for sharing our belief in the international squad.
The contract extension that commences with immediate effect was welcomed by Jonathan Hill, the CEO of the Association. The Board gave me clear instructions to agree a deal that will see Stephen in charge for the upcoming Euro 2024 and the upcoming Nations League campaigns, at a time when there is so much excitement about the future of the Ireland squad.
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We look forward to working together as he seeks to guide Ireland to the next European Championship finals.
The Republic's opening four matches of the Nations League next June will be Kenny's next competitive matches in charge after failing to qualify for the winter World Cup.
Ireland will play Scotland and Armenia in September in their final two games of the group.
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In March they face Belgium and Lithuania.
The draw for the Euro 2024 qualification will take place in October.