I usually start to see the question posed "What kind of lens must i use for wedding photography?" For those intents and purposes, I'm only going to speak with Canon lenses but I know that this information could be transposed for Nikon purposes. I'm also assuming that because you're shooting weddings, you're really serious about photography and also have (or will) invested money into quality fast glass.
You will find really two methods for you to approach it when looking at renting or purchasing lenses. Wedding photography is generally shot in low-lit conditions and you should have fast glass, that's lens with high apertures. In addition, you want lenses which have excellent optical quality but that's obvious.
Because of this, primes are fantastic when shooting weddings if you can to maneuver free and quickly and "zoom with your feet". In what can be considered to be the "trinity" of primes, the Canon 35mm f1.4 L lens, Canon 85mm f1.2 mkII L lens and Canon 135mm f2. L lens is a superb trio of lenses it's possible to use whether or not they are shooting wide or zoom.
If you want to become more versatile or are not able to be able to zoom, the Canon 24-70mm f2.8 L lens and Canon 70-200mm f2.8 IS L lens are a great combo that is very versatile plus relatively fast at f2.8. Obviously it's not as quickly as the primes are however, you have the ability to ranges from 24 to 200 covered.
I hope that these statements have been beneficial in considering some of the choices given all of Canons lenses around. I regularly shoot with these 5 lenses (usually either the zoom options or the prime options depending on what I am shooting in).
