Recently, I created wedding announcements for the engaged couple who had their photos taken with me. And why not share it with everyone, right? So I made several variations, always in A4 format, which you can fold and put in an envelope, and in DL format, which actually has the dimension of a classic envelope (without folding). All variants are in PSD format and can be freely edited in Adobe Photoshop. So, your photographer can edit it and replace it with his (or your) photo and rewrite the texts as you need.
And if you would like to edit some of the announcements from me, or even take pre-wedding photos that we could use in the announcement, feel free to contact me :)