The 63rd World Science Fiction Convention (Worldcon), also known as Interaction, was held on 4–8 August 2005 at the SEC Centre with the attached SEC Armadillo and Moat House Hotel in Glasgow, United Kingdom.

In addition to the guests of honour, notable participating science fiction and fantasy writers and artists included: Brian Aldiss Iain M. Banks Stephen Baxter Terry Brooks Jim Burns Susanna Clarke Jonathan Clements John Clute Cory Doctorow Greer Gilman Simon Green Joe Haldeman Peter F. Hamilton Harry Harrison Robin Hobb P. C. Hodgell James P. Hogan Tanya Huff Conor Kostick Ellen Kushner Alan Lee Anne McCaffrey Ian McDonald Ken MacLeod George R. R. Martin China Miéville Elizabeth Moon Richard Morgan John Picacio Terry Pratchett Robert Rankin Alastair Reynolds Justina Robson Kim Stanley Robinson Delia Sherman Robert Silverberg Michael Swanwick Harry Turtledove Connie Willis Frank Wu The World Science Fiction Society administers and presents the Hugo Awards,[1] the oldest and most noteworthy award for science fiction.

Categories include novels and short fiction, artwork, dramatic presentations, and various professional and fandom activities.

[1][2] Other awards may be presented at Worldcon at the discretion of the individual convention committee.

[3][4] Due to the changes in the World Science Fiction Society rules, which reduced the lead time from three to two years, no Worldcon site selection took place at this convention.