Indeed, the 19-year-old, who moved from the Dons to White Hart Lane over the summer (the move was agreed in January) has shown an impressive level of maturity since joining up with the Tottenham squad.
The MK Dons boss told talkSPORT's Drive show on Thursday afternoon: "Yeah, I am a little bit [surprised at the call-up]. He’s definitely someone that we’ve always said will play for England.
"The way Spurs have handled him has been remarkable. He didn’t expect to go out on loan in the summer and said he wanted to stay.
"There will be some nerves but his maturity means he’ll handle it. He won’t get carried away, he knows he won’t achieve anything."
It certainly looks like Alli won't be fazed by anything. From Real Madrid to Monaco, to Crystal Palace and Manchester City, the 19-year-old has remained calm and composed.
Naturally, the Tottenham youngster will likely do the same while on England duty.
The only danger is the hype and expectation getting to everyone else! Indeed, if excitement reaches fever pitch and Alli doesn't produce miracles, England fans are likely to come down on the teenager harder than anyone else due to the expectations that have been built up.
For now, the Three Lions are only up against Estonia (with due respect); let's hope the Spurs talent takes the opportunity for what should be an exciting and invaluable bit of experience.