How do I create a 3 dimensional 2x2x2 Array of Sprites?

I’m trying to create a 3D array, then fill it with Sprites. I tried using

var spritesArray : Sprite[][][] 

but that wouldn’t work, so I tried to create a blank array :

var SpritesArray = new Array();
SpritesArray[0] = new Array();
SpritesArray[1] = new Array();
SpritesArray[0][0] = new Array();
SpritesArray[0][1] = new Array();
SpritesArray[1][0] = new Array();
SpritesArray[1][1] = new Array(); 

But now even that won’t create. It’s just a blank array? How do I create a 3D Array?

Never use the Array class; it’s slow and untyped.

var spritesArray = new Sprite[2, 2, 2];