Okay that's not true, I didn't find a second Jess for this picture and did edit two shots together. We just didn't have a third person on hand to take the picture. However, the size altering effects are all done in-camera, as you can see from the unaltered source images below. Eagle-eyed readers can probably work out how it's done as it's still a bit of a work in progress. The rest will have to wait until the big day when you too can undergo this fantastical hobbitization process.