The above answer is correct, but I just wanted to add, getting movie files from the net is tricky, because, as has already been pointed out, not all are legit.
when you download a movie using torrents you need to check the comments to make sure it is not a fake. anti piracy organisations are filling trackers with 'fake' torrent files. Use a search engine like http://www.btjunkie.com which allows users to comment on the quality (or not) of the file. You can see from what they say whether its a valid download or not, and what the video and audio is like.
-read the comments first, you will save yourself a lot of wasted downloads
-also remember to scan everything you download with a good, up-to-date antivirus
Also, you may want to check out
http://www.rlslog.net
http://www.moviebay.org
http://www.moviex.info
Happy viewing!