Ezra Miller, the actor playing “The Flash” in the upcoming standalone film and “Justice League” movie refused to sign a Marvel comic book for a fan.

At an event for “Fantastic Beasts and Where to Find Them” in the U.K., Miller was approached by the fan with an “Agents of S.H.I.E.L.D” Marvel comic book to sign.

“You understand why I can’t sign that, right?” Miller can be seen ask lightheartedly in a YouTube video posted by user Nero Leon. “Find me something else, I’ll sign it. It’s so obvious that I can’t sign [that Marvel comic]. I’m sorry.”

Also Read: DC Films' 'The Flash' Loses Director, Likely to Be Postponed

You can then hear the confused fan say something like “isn’t ‘Justice League’ Marvel as well?” to which Miller responded “No, it’s DC. They’re competing comic book houses. I’m so sorry, I really can’t [sign that]. I’m dead sure.”

Fans got their first glimpse of Miller as the Flash in (DC’s) “Batman v Superman: Dawn of Justice.” He also plays the part in the forthcoming “Justice League” and appeared briefly in the summer hit “Suicide Squad.”

Meanwhile, “The Flash” standalone film is currently without a director as Rick Famuyiwa left the project citing “creative differences.” Warner Bros. is out to directors seeking a replacement.

Also Read: 'Justice League' Trailer: Watch Batman Recruit Aquaman, The Flash and More (Video)

A similar thing happened when Michelle MacLaren left the studio’s “Wonder Woman” over creative differences in 2015. She was eventually replaced by director Patty Jenkins.

Miller is currently playing the mysterious character Creedence in J.K. Rowling’s Harry Potter prequel “Fantastic Beasts and Where to Find Them”

See his awkward fan interaction in the video above.