Every year, over 100,000 people attend the Comic Con in London to see their favourite actors, directors and artists in the sci-fi, fantasy and manga world, and to buy memorabilia.
But the convention is most famous for the people who wear incredible cosplay outfits, or role-playing costumes.
Some are incredibly elaborate and would cost thousands of pounds to create.
The idea is to escape from reality for just one day and pay homage to their favourite TV programmes, movies, comics and popular culture characters.
Here are some of our favourites from this year's show: