The 15th World Science Fiction Convention (Worldcon), also known as Loncon I, was held on 6–9 September 1957 at the King's Court Hotel in London, United Kingdom.
Events included a "fancy dress ball" on the evening of Friday, 6 September.
Categories include novels and short fiction, artwork, dramatic presentations, and various professional and fandom activities.
[4][5] Other awards may be presented at Worldcon at the discretion of the individual convention committee.
As a result, only the three Hugo Awards for Best Professional Magazine and Best Fanzine were given out at the 1957 Worldcon.