Funnyman Will Ferrell is attempting to stage a world-record attempt with 1,500 costumed superheroes.
The Elf star is hoping his publicity stunt for new animated movie MegaMind will claim the Guinness World Records title for the Largest Gathering of Superheroes.
The attempt will be made at Los Angeles L.A. Live theatre on 2 October (10).
To qualify as a participant, film fans have been asked to arrive dressed as an "easily recognisable superhero that has appeared in a published book, comic, television program or film".
The feat will be judged by official Guinness World Records adjudicator and spokesperson, Stuart Claxton.