Research and planning: voice over information

As a group we have decided to use a voice over in our trailer. We have decided to put it at the beginning of the trailer rather than the middle / end. We also decided that if we did it ourself it would probably sound cheap so we are asking somebody we know to get us our voice over done professionally, in the accent that you hear in a lot of trailers. Rather than explaining what's happening in the trailer like the one heard on my analysis of The Conjuring, we would rather say when the film is coming out and more about it rather than an explanation.