Alli trained with the Three Lions' senior side for the first time on Wednesday, and Kane was keen to encourage his club teammate before he took to the field.
Alli revealed: "I was going down for pre-match earlier and all the lads congratulated me, Harry spoke to me and said ‘go there and do well – you know what you can do’.
“They’ve been really good, I came in the car here with H, and since I’ve been here the Spurs boys have really looked after me, and so have the others.”
Kane, himself, has only recently broken into the England senior set-up, but he has already been identified as a leader.
Tottenham announced Kane as their vice-captain at the start of the season, showing the faith that Mauricio Pochettino has in him despite his tender years.
England face games against Lithuania and Estonia over the international break, and Alli and Kane will be looking to impress for their country, if given the opportunity to play.
Although the Three Lions have already made it to Euro 2016, Alli has never played for his country's senior side before and will be eager to prove his worth.
Kane, meanwhile, has struggled to find the back of the net this term for Spurs, but could use the time away from White Hart Lane to try and boost his confidence.
Kane has scored three goals in his first four appearances for England, and he will be aiming to maintain his fine scoring record and get some momentum going in his season.