Movie trailers often have a star actor and actress in it because that's what sells. Big names in the box office can increase the number of filmgoers into phenomenal numbers. When you consider the cost of millions to create the image they want to do all they can to ensure it does not flop at the box office.
Many people watch the trailer while watching TV. Keep in mind that what you see although it is based on demographic information pertaining to spectators who will be tuned to a channel that at this point in time. If you want to be more objective about the show you will see the Movieclips Trailers online
You can easily find them for a show that will soon be in theaters as well as those who are playing. If you missed the movie and is now offered on DVD, you can find people who are older trailers. It can be fun to go back and watch some movie trailers from your favorite actor or actress as well.
It is funny how we do not pay attention to them in many shows and then there will be a big hit, and suddenly we are very tuned into what they do and who they are. Will be back to see some of the older work although they can attract. It can also give you a new appreciation for how hard they've worked to get to where they are.
Sometimes the movie trailer can be misleading though so you have to be careful. They can show you some great scenes and then once you see the movie you realize that they are the only good scene it was bid! Do not base your decision to go to the box office and see the movie solely on what is offered in the trailer.Read reviews online as well and get a good feel for watching.