That is one tricky question!
First thing to accept is the following: the copyright always belongs to the author, in our specific case to the photographer. You cannot own the copyright for a picture you have not taken personally.
What does this mean? This mean that in case you would like to use your wedding photos for a commercial use ( making money from it) , you have to talk this out with the photographer who has taken the photo.
This however doesn’t mean that only low resolution files will be delivered, or that you cannot print your photos.
The final product belongs to the client, high resolution images should always be delivered, and the photographer should grant usage and print rights.