To begin with, you have a couple problems to deal with. The toughest one is that the bride, her skin, her hair, her dress, the wall and the white chocolate statue all blend together. If you make a levels adjustment first, that will help because you will have to make a selection of the wall, the window, and the statue behind the bride. How you make the selection -- how well you make the selection -- is vital to the results. Changing the color, darkness, etc., not so hard. I would recommentd selecting the wall not just over the groom's shoulder, but the entire wall.
Depending on how particular you need to be, the feathers and hair fringe will be difficult to work with, but not impossible. Personally, if there is no objection from the bride (or any vested interest :} ), I would remove the statue altogether. The only careful part with that is to clone the drape over its hand, careful work but not hard. Of course, if you change the color of the wall, etc., the statue will at least not look like it's growing out of the bride's body.
Backlit photos like this are difficult to fix. It's not a simple exposure problem; it's two entirely and widely different exposures.
Once you make a decent selection, and it will probably require use of more than one tool, personally I would immediately save it: select>save selection. You can then duplicate this so that you work with it separately or use adjustment layers over the selected area. Now you can do an exposure, curves, or levels adjustment. Then you could use a color blend mode layer to adjust the color of the wall, etc. With the selection active (you may need to refine edge and/or feather the selection for it not to look cut out), create new layer, fill with the desired color and play with the opacity and blend modes: color, soft light, hard light, etc. Depends on the mix of colors from one layer to the other.
Anyway, in PS there are many ways to go about doing the same thing. I think this is pretty direct but others may have different ideas that would work better for you. I hope this was helpful and I do hope you get it done to your satisfaction. Please keep us up to date with your changes and the result. Thanks.
