According to IMDb, the original Ghostbusters movie from 1984 is rated PG, which means that parental guidance is suggested. However, it is important to note that the British Board of Film Classification (BBFC) has recently re-rated the film to 12A due to a "ghostly sex scene" that takes place during a montage. This means that children under 12 must be accompanied by an adult to watch the movie in the UK. It is also worth mentioning that Common Sense Media and Parent Previews both provide detailed reviews of the movies content, including sexual remarks, scary scenes, and smoking, which parents may want to consider before deciding if the movie is appropriate for their children.