In a surprise treat for fans, Batman v. Superman: Dawn of Justice stars Ben Affleck and Henry Cavill will hold a previously unannounced autograph session at the DC Entertainment booth at Comic-Con International: San Diego this weekend, Deadline reports.

The exact time and date is still unconfirmed, but it will likely be either Friday evening or Saturday evening, following Warner Bros.’ big Hall H panel.

The film’s Wonder Woman, Gal Gadot, may appear at the signing as well, but those arrangements have not yet been confirmed.

Check out when Batman v. Superman: Dawn of Justice and other movies are coming out in ComicBook.com's Movie Release Schedule.

Follow along with ComicBook.com's San Diego Comic Con 2015 coverage by clicking here.