Tottenham Hotspur tied the 23-year-old down to a new contract.
The 23-year-old put pen to paper on a new deal which runs until 2022 on Thursday.
According to BBC Sport, Kane, who was reportedly reluctant to sign the extension last month, will earn over £100,000 a week with the North London outfit.
The English striker has netted up to 70 goals since breaking into Mauricio Pochettino's side only two years ago and such form was going to attract the likes of Manchester United, Manchester City and Real Madrid eventually.
But Tottenham chairman Daniel Levy has made his thoughts on Kane perfectly clear by tying him down, and the ex-Arsenal defender says it's great to see the hitman - who rose through the ranks at the White Hart Lane club - rewarded with such a deal.
Asked if it's a statement of intent by Tottenham, Keown told The Mail: "Very much so — this will almost feel like a new signing for Tottenham. It is known that they are a little bit behind some of their top-four contenders in terms of what they pay players.
"They have had to take a decision — if they don't secure the players they have then other clubs will come swooping. Tottenham are building — both on and off the pitch — and they can't afford at this stage to lose their top talents.
"Dele Alli and Eric Dier signed new deals not long ago and Kane signing is really good news. What is healthy is that Tottenham have shown they are prepared to reward players who deserve it.
"Tottenham have looked after one of their own. It's always great to see someone do well who has made it through the ranks. You don't want to see a player who has just taken off go and play for someone else."
Keown caused a bit of a stir earlier this week by claiming, on BBC's Match of the Day 3, that Mauricio Pochettino's side were 10 years behind North London rivals Arsenal.
Given his background with the Gunners, Keown was accused of bias by Tottenham fans, who may be pleased to see the pundit say something positive about their side.
Pochettino and co, who sit fifth and four points behind their neighbours in the race for a top-four finish, host Swansea City this weekend as they bid to bounce back from the 2-1 defeat by Premier League leaders Chelsea - who are seven points ahead of them - on Saturday.