Here's a really cool site that gives you all kinds of info about any movie. This info includes things like the release date, how much it grossed, the actors, director etc. It's really quite interesting...
In the upper left hand corner there is a "search" box. Type in the movie title there.
Here's a listing I did for "sixteen candles":
Domestic Total Gross: $23,686,027 Distributor: Universal Release Date: May 4, 1984 Genre: Comedy Running Time: 1 hrs. 33 min. MPAA Rating: PG Production Budget: N/A