Tom Welling (“Smallville,” “Lucifer”), Ian Somerhalder (“The Vampire Diaries”), six stars of the cast of “Outlander” (Sam Heughan, Catriona Balfe, Graham McTavish, Lotte Verbeek, Richard Rankin, Sophie Skelton) and Guardians of the Galaxy standout Pom Klementieff are among the hundreds of celebrities and industry professionals at the 21st annual 2018 Wizard World Comic Con Chicago, part of North America’s largest pop-culture touring expo, August 23-26 at Donald E. Stephens Convention Center. Tens of thousands of fans will be on hand to celebrate the best in pop culture: movies, comics, cosplay, video gaming, television, original art, collectibles, contests and more. Wizard World Comic Con Chicago will also feature non-stop live entertainment throughout extended evening hours, gaming, exclusive QandA sessions with top celebrities, movie screenings, anime, kids zone and more. Top creators scheduled to attend are Diana Gabaldon (Outlander novels), Mike Grell ("Green Arrow," "Batman"), Ryan North ("Adventure Time," "Squirrel Girl"), Jonathan Glapion ("Batgirl," "Wonder Woman"), Bob Camp ("Ren and Stimpy") and more. Admissions start at $35, kids 10 and under free. Visit http://wizd.me/ChicagoPR for more info. Thursday, August 23, 4-9 p.m. Friday, August 24, 12-7 p.m. Saturday, August 25, 10 a.m.-7 p.m. Sunday, August 26, 10 a.m.-4 p.m.