TMDb Movie Database has now been activated in the forum, giving members the option to add whole host of movie/TV information on the media they post about.
Here's how to use the settings and it's very simple:
Under the body text of your post you have SETTINGS which when clicked will will allow you to attach movie or TV show and also attach actor.
Here are a couple of guide images to illustrate:
Where possible, please keep movie chat to the entertainment section.