Over the top
A fairytale wedding needs to be magical and slightly over the top. This should permeate everything, from what you wear, to your entrance at your wedding venue, through to your decorations and wedding reception.
If you want your wedding to be like something out of a fairytale it also needs to have an otherworldly quality to it. This means doing things that are slightly out of the ordinary or on a different scale to what people might expect.
For example, you might forgo the traditional wedding cake for a tower of smaller cupcakes. But you could work with a cake designer to make those cupcakes look like a number of smaller wedding cakes.
This sort of twist on expectation is perfectly suited for a fairytale theme, as it helps keep your guests engaged as nothing is quite what it initially seems.
Think about how you can add to parts of the wedding. For instance, as your guests arrive, stilt walkers could serve drinks to them, close-up magicians could wow them with card tricks, or they could be led through stunning scenery to where your ceremony is being held.