Perhaps any film with Meg Ryan in it will be a romantic classic, and this one has all the makings. It is an hilarious clash between 19th century aristocratic values, and the harsh realities of 21st-century New York.
The premise is that the central character of the story has slipped through a hole in time, from 1875 to early 21st century New York, and the consequences are both hilarious and rather a sobering reminder of how much we have left behind when for example a gentleman would stand when a lady left the dinner table.
If you like films with a good role for a dog, and a horse, then this film is for you.
I really wouldn't be surprised if this does become a romantic classic, unusual as it is in its plot devices, and although it involves time travel, it isn't hung up with all of the gimmickry you might imagine.
Instead, it is a fantastic script, with wonderful performances, and some are really humourous moments that you will definitely laugh at.