The new deal ties the striker to the club for the next six years and follows the five-year deal signed by Pochettino next month -y'know the one that definitely *doesn't* have any release clause.
Tottenham are due to return to White Hart Lane next season, after a season as tenants at Wembley.
Kane's deal is expected to be announced later today, while further extensions are expected to follow, with fellow England worldwide Dele Alli in similar discussions with the club. In Harry Kane (Southgate's appointed captain), Dele Alli, Eric Dier and Kieran Tippier, as many as four Spurs players are likely to start the opening World Cup game against Tunisia - Danny Rose may well lose out to Manchester United's Ashley Young.
Now Tottenham have a forward who has scored at least 25 goals in the Premier League alone in each of his last three seasons.
The announcement for the new contract came in a rather novel manner as the club posted a brief video update showing the progress in construction at the new stadium.
The 24-year-old told the club's official website: "I'm really excited, it's a proud day".More news: John Goodman finally speaks on 'Roseanne' cancellation
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Kane's current deal was until 2022.
He joins manager Mauricio Pochettino in committing his future to the club and the duo will have their sights on plotting the downfall of numerous defences at home and overseas when 2018-19 rolls around.
Despite England's 2-0 victory over Costa Rica, former England worldwide Paul Mariner was not pleased with the team's uninspired performance. That fact could keep him at the club for many years, even if he could still earn more elsewhere.
Securing Pochettino to an £8.5 million-a-year contract was key to Kane's decision to stay, despite interest from Real Madrid.
Kane heads into the World Cup as England captain looking to add to his two Premier League Golden Boots with an worldwide equivalent.
"I'm obviously really excited about the World Cup coming up so it's nice to get this done before that and I'm just looking to go out there and enjoy it now".