New Zealand hammer holders England by nine wickets
Conway hits brilliant 152 not out and Ravindra smacks superb unbeaten 123
Kiwis reach their target with 13.4 overs to spare
England labour to 282-9 - Root hits 77 and Buttler makes 43
Henry takes 3-48 for Black Caps
Dawid Malan gets himself off the mark in a much calmer fashion, just dabbing a single down to deep third.
But there's not been much calmness about Jonny Bairstow's start. He drills another straight back past Trent Boult for four more.
There's a heart-in-mouth moment as Devon Conway tumbles trying to save the boundary, getting his knee stuck in the ground, but thankfully he's fine.
England start in style.
Steven Finn
Former England bowler on BBC Test Match Special
Bairstow walked towards Trent Boult there as he did when Alex Carey ran him out in The Ashes.
Jonathan Agnew
BBC cricket correspondent on Test Match Special
The second ball of this World Cup has flown out of this enormous playing area.
Jonny Bairstow puffs out his chest. That's not a bad way to start! That's a statement.
What a way to get off the mark in a World Cup!
Jonny Bairstow flicks one off his pads with stunning timing for six!
And there's the Bairstow swagger.
Full, straight and bang on target from Trent Boult first up.
Jonny Bairstow defends solidly.
Jonny Bairstow and Dawid Malan skip to the middle with a few swishes of their bats and some last-minute stretches.
Trent Boult, one of my favourite ever bowlers to watch, is going to bowl the first over of the World Cup.
Jonathan Agnew
BBC cricket correspondent on Test Match Special
Looking out there, I'm not sure there is anywhere in world cricket where the dressing rooms can be further apart.
They're miles apart, separated by orange-red seats.
The national anthems are done, after both teams walk out to the middle with their mascots.
It's always a sweet moment seeing how excited the children are, although Tom Latham's is practically the same height as him.
That ends the formalities, though. Let's get going.
Alex Hartley
Former England bowler on BBC Test Match Special
Jos Buttler said that England want to be attacking. They don't want to defend this World Cup, they want to attack it.
They've got a team packed with all-rounders and they might well treat the middle overs like a T20 game. If they get going, it could be carnage.
The middle overs are always really important and can be where you win and lose the game.
The World Cup trophy is paraded into the middle of the pitch by India great Sachin Tendulkar, much to the delight of the fans that are in attendance at the moment.
The stadium is nowhere near full (that takes some doing) and probably won't be today, but there are still plenty of England and New Zealand shirts dotted around.
Most of them have wisely opted to find a bit of shade.
Matthew Henry
BBC Sport in Ahmedabad
I can confirm it’s baking hot, although, as a man from the north east of England, I say that in most places.
Reece Topley told me the other day the warm-up game in Guwahati, where it was hot but also very humid, were some of the toughest conditions he’s played in.
It’s not as humid here at least.
Image source, Getty Images/BBC SportEngland have got a 15-man squad out in India as they look to retain the 50-over World Cup.
But, who could be the next James Bond? Who is the heartbeat of the team? And who is always in the shadow of a team-mate?
BBC Sport have teamed up with fast bowler Reece Topley to give you the down low on the England squad.
Steven Finn
Former England bowler on BBC Test Match Special
The surface looks dry, it's a touch patchy from a distance but Jos Buttler mentioned it looks a good wicket and an opportunity for England to score some runs in the first few overs.
England: Jonny Bairstow, Dawid Malan, Joe Root, Harry Brook, Jos Buttler (capt/wk), Moeen Ali, Liam Livingstone, Chris Woakes, Sam Curran, Adil Rashid, Mark Wood.
New Zealand: Devon Conway, Will Young, Rachin Ravindra, Daryl Mitchell, Tom Latham (capt/wk), Glenn Phillips, Mark Chapman, James Neesham, Mitchell Santner, Matt Henry, Trent Boult.
Matthew Henry
BBC Sport in Ahmedabad
Hello from the world’s biggest cricket stadium. 130,000 people can fit in here, although I doubt there’ll be as many here today.
It is, unsurprisingly, massive.
England captain Jos Buttler: "It looks like a really good wicket so we just can't wait to get going.
"We're in a really good place as a team.
"We're very proud to be world champions and what we achieved four years ago but this is something new. We're not defending anything, we're here to attack and win it again.
"Ben [Stokes] is going to miss this game with a little hip niggle. We are hoping he'll be fit for our next one."
New Zealand captain Tom Latham: "We're going to have a bowl, it looks a reasonably good surface but hopefully later on when we get a chance with the bat, it gets better.
"Preparation has been great, we've had guys in all parts of the world and we came together about a week ago, had a couple of good warm-up games and guys are excited to get stuck into things.
"Any matches you play leading into a World Cup are vitally important, we had an exciting series with England that unfortunately we came out on the wrong side of but it was great preparation.
"Unfortunately, Kane Williamson is not quite ready yet but hopefully it's a day by day thing. Lockie Ferguson has got a bit of a niggle so he'll miss out."
Tom Latham gets his way.
New Zealand are going to have a bowl first on what looks like a boiling hot day in India.
England skipper Jos Buttler admits he would have bowled first as well.
So the men's World Cup 2023 is finally getting started, in a rematch of 2019's epic final.
England start their title defence against New Zealand at the enormous Narendra Modi stadium in Ahmedabad.
We'll have the team news from both camps, and the result of the toss for you shortly.
Morning all.
Let's go again, shall we?
Image source, Getty Images
Image source, Getty Images
Image source, Getty Images