Themes21 have one of the complete free wedding WordPress themes on the list. You will not have to do any work as such, yet you can make all the customization easily. The design of the theme is really awesome, and it feels like a perfect wedding theme. The layouts are creative, and all the necessary ingredients are there to make new posts, upload videos, and images. There are plugins for rotatory text and images, and you can change the color of the theme with a single click.