So for kicks and giggles, I made a variation of the "Keep Calm" sign. It seemed fitting since the Keep Calm phenom is British in origin. I made two versions; one with the couple's initials and one without. I used "C" vs "K" since the bride's formal name is Catherine. Sized to 8x10. Click on image to bring to full size. Right click to "Save As".
Here are some other fun and free Royal Wedding printables from Design Editor