Brighton & Hove Albion manager and his assistant Mauricio Taricco have signed new contracts that will keep them at the club for the next five years.
Poyet told the club's website: "The new contracts will allow us to make even more long-term plans, particularly with the new academy and training ground.
"I am delighted. The last two years here have been absolutely fantastic."
He added: "Both Tano [Taricco] and I would like to thank the chairman and the directors - and also my staff and the players, who have been crucial in our progression as a club."
The former Chelsea and Tottenham midfielder took on the manager's role when Brighton were 20th in League One.
He led a remarkable turnaround, guiding them to safety before winning the league in his first full season in charge. The Seagulls are currently in contention at the top end of the Championship table.
Brighton chairman Tony Bloom added: "This is great news for the club. Gus and Tano are key to all of our immediate and long-term plans.
"When you consider the position the club was in when they arrived, what they have achieved here in less than two years is outstanding.
"This gives the club even more long-term stability and further underlines their own commitment to the club.
"Gus and Tano have brought us success, and in doing so revolutionised the way the Albion play; giving us a brand of football the supporters love watching.
"I am certain they will continue to be successful and the club will continue to progress with them in charge of the team."
Connect with Sportsvibe by joining our social media network. Join the debate to get your voice heard and stay informed with up-to-the-minute news, videos, competitions and articles from the world of sport.
Follow us on Twitter: @sportsvibe_says and @sportsvibe
Follow us on Facebook: Sportsvibe Says