Bill Murray was bitten by the groundhog twice during shooting.
Director Harold Ramis originally wanted Tom Hanks for the lead role.
Tori Amos was considered for the role of Rita.
A family of groundhogs was actually raised for the production.
In Woodstock Illinois, there's a small plaque that reads “Bill Murray stepped here” on the curb where Murray continually steps into a puddle.
Harold Ramis and Bill Murray argued all through the film. The two have not spoken to each other since.
There are exactly 38 days depicted in the movie either partially or in full.
- 7 Things You Probably Didn’t Know About The Movie Groundhog Day
