This is a bit tricky because:
* This is likely not an actual movie title: The phrase describes an event, not a film.
* 1956 was a year of political and social change: The event you're referring to could be connected to the 1956 Summer Olympics in Melbourne, Australia.
To find the actors involved, we need more information:
1. Confirm if it's a film: Are you sure this is a movie?
2. Provide more context: Did you see a poster, trailer, or other material? Is there any other information about this film?
Once you have more information, it will be easier to find the actors involved.