The Englishman joined from MK Dons relatively unknown, but has become a star for both club and country in the years since, alongside striker Harry Kane.
Despite not signing any new players in the summer, and failing to win a trophy in his time at the club despite coming close on several occasions, the ambition the club are showing was enough to convince Alli to sign a new deal.
“Some of the players who have also signed, I think you can see that we all want to be a part of this journey together" the attacking midfielder said.
"We all want to achieve something great. As young players as well, we want to keep improving and this is a great place to do that. The feeling around the place is positive.
"It’s not all about winning trophies for me yet at my age. I want to keep improving and trying to become the best player I can.”