Harry Potter mobile game launches today
An augmented reality Harry Potter mobile game is rolling out today in the US and UK.
The game makes fictional characters appear on people's phones as if they existed in the real "Muggle" world.
Users will play the roles of wizards, whose tasks include casting spells and teleporting themselves.
The game itself is free, but players will have the option to buy currency in the game using real money.
Some experts estimate players could spend up to $100 million in the first month alone.
There's still no word on when the game will be rolled out in other parts of the world.