Comic-Con fans got quite the treat on Saturday.
Fox surprised the crowd, bringing out the entire cast of X-Men: Days of Future Past, causing a serious screamfest.
Director Bryan Singer posted to Twitter a pic that includes everyone from Ian McKellan, Patrick Stewart, Hugh Jackman, James McAvoy, Michael Fassbender, Jennifer Lawrence, Peter Dinklage, Anna Paquin and a pregnant Halle Berry
One Comic-Con goer shared that "Walking by Hall H as the entire X-Men: Days of Future Past cast hit the stage & swear the ground shook the screaming/applause was so loud."
A source confirms to E! News there was "Epic nerdgasm going on."
Here's to being a lucky X-Men fan!