The whole world is waiting to see what Kate Middleton will wear when she walks down the aisle to wed Prince William on April 29, but there's another storybook wedding millions of people are even more anxious about.

What, these millions are wondering, will Bella Swan wear when she marries her immortal love, Edward Cullen, in 'Twilight: Breaking Dawn'?

And now, Twi-hards have their first glimpse at that all-important costume. Entertainment Weekly has an exclusive peek of the wedding dress.

It's just an illustration, but the sketches from Stephenie Meyer's new book, 'The Twilight Saga: The Official Illustrated Guide,' not only preview the gown, but also what Bella will look like as a vampire.

Illustrations after the jump.

The artwork is by Young Kim, whose work you've seen in the 'Twilight' graphic novels.

'The Official Illustrated Guide' goes on sale April 12. ''Breaking Dawn: Part 1' hits theaters November 18.

[via Entertainment Weekly]