Spurs are to meet Millwall in the FA Cup quarterfinals.
Kane had a loan stint at The Den in 2011-12 when his nine goals in 27 games helped keep the South Londoners in the Championship — and ended with him being crowned the club's Young Player of the Year.
Kane said: “It was a great experience for me and there is no doubt it was a big stepping stone to where I am now.
“I was only 18 and it was my first time in the Championship. Everyone knows it can be a tough place to play but I learnt so much in a short space of time and it definitely helped me grow up."