National Comic Book Day Geek Out On Stars In Costumes

9/25/2015 12:01 AM PDT

National Comic Book Day -- Geek Out On Stars In Costumes

It’s the most marvel-ous day of the year -- National Comic Book Day -- and even though you may have sudden urges to leave your house dressed as a superhero ... it's probably best to leave it to professionals.

Check out these stars in some serious cosplay pics!