Popsugar Entertainment Halloween Costumes 2021 The Best Pop Culture Halloween Costume Ideas For 2021 60 of the Best Pop Culture Halloween Costume Ideas For 2021, From Marvel Heroes to Cruella de Vil 9 September 2021 by Alessia Santoro View On One Page Photo 47 of 56 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 47 Alex From Roswell, New Mexico What to wear for Alex: Alex's style is cool and laid-back, so be sure to wear something similar. Pair a stylish, patterned button-down shirt with black pants. Previous Next Start Slideshow Halloween Costumes 2021Halloween Costumes For MenGroup Halloween CostumesDisney Halloween CostumesHalloween Costumes For WomenCouple Halloween CostumesPop Culture Halloween CostumesMoviesHalloween CostumesHalloween