However, there are a few actors who might be difficult to link to Kevin Bacon:
* Actors who have only worked in very niche genres or independent films: They might have limited connections to the mainstream Hollywood actors who are more likely to have worked with Bacon or his co-stars.
* Actors who only worked in the early days of film: The further back you go in history, the fewer connections there are to modern actors.
* Actors who have only worked in specific regions: An actor who only worked in a specific country or region might not have the same degree of overlap with American actors.
It's important to note that with the vastness of the entertainment industry, it's very likely that even these actors can be linked to Kevin Bacon, but it might take a lot of research to find the connections.