"Age of Ultron" (abbreviated AU) is a 2013 comic book fictional crossover storyline published by Marvel Comics that involved the conquest of the Earth by the sentient robot tyrant Ultron. The storyline consisted of an eponymous, 10-issue core miniseries, and a number of tie-in books.

The storyline was published between March and June 2013 and featured a storyline by Brian Michael Bendis.