http://www.johnnydepp.com/
http://www.johnnydeppfan.com/
Obvioulsy a fansite for Johnny Depp. It advertises pretty much all of his well known films. this shows how the star itself can advertise a film solely by their being in it. It also tells you about up coming films that he will be in which is also a good way of advertising films before they have even be released. People will be likely to go and see the film simply because of the presence of Johnny Depp.
The rumours that are circulated around the internet are just as powerful for advertising as psoters, trailers or reviews etc. Even if they are untrue it still draws attention to the film.