The Most Amazing Cosplay of San Diego Comic-Con 2025, Day 1

It’s that time of year again; San Diego Comic-Con is upon us and is off to a festive start for the biggest fan party of them all.

Between the convention floor bustle and the packed panels, all of nerdom comes to represent their genre favorites for the annual celebration of all things pop culture and comics. Five Nights at Freddy’s 2 reigned supreme on the first night along with Toxic Avenger, and South Park but it was the fans who came decked out in their fandom’s finest who always stole the show. Many of whom dressed to impress as icons represented in films, television, and more that were at the con to showcase the latest.

Let’s jump into it with a look at some of the characters we spotted in cosplay form on Day 1, from merry Marvel mutants, to Harley Quinn cats, to Star Wars faves and much, much more!

Stay tuned to io9 for even more coverage of San Diego Comic-Con 2025 (and, of course, plenty more cosplay).

Want more io9 news? Check out when to expect the latest Marvel, Star Wars, and Star Trek releases, what’s next for the DC Universe on film and TV, and everything you need to know about the future of Doctor Who.