'Groundhog Day' is often cited as one of the best comedies ever made and Bill Murray's greatest on-screen performance.

Playing a vain, self-centred weatherman who becomes trapped in a time-loop in rural Pennsylvania during a local ceremony involving a groundhog, the movie became a box-office smash and confirmed Murray as a talented comedic actor who was capable of bringing a depth that hadn't been seen before.

The production, sadly, caused a rift between director Harold Ramis and Murray - and the two never worked together again - but what they made is now a classic.

Here's some useless trivia on the movie.