Last we’d heard, Marvel legend Stan Lee wouldn’t be showing up Guardians of the Galaxy because he didn’t have much to do with the comic — though, apparently, things have changed.

Stan Lee cameos have become a vital part of Marvel’s movie franchises, and the comic architect has showed up in everything from Spider-Man to Thor over the last few decades. But most of his cameos came in films based on comics he helped create or launch — and Guardians was a bit out of his wheelhouse.

But that doesn’t mean director James Gunn was going to leave him out of the fun. While speaking at the recent C2E2 convention, the 91-year-old former editor-in-chief of Marvel Comics confirmed he will pop up in Guardians of the Galaxy. He was just a little cagey about the details, though.

Here’s what he told the crowd, via Comic Book Resources:

“Now [Marvel Studios will] get mad at me. I can tell you that I don't understand what it was or why I did it. It was with a girl, a pretty girl. But you'll get a kick out of it."

Between Zoe Saldana and Karen Gillan, there are a fair share of “pretty girls” in the lineup, so that could mean a few different things. But Lee also hinted that the scene could have something to do with a “hologram” (not to mention his clean-shaven look, missing his iconic mustache).

So, best guesses?

Guardians of the Galaxy opens Aug. 1.

(Via The Hollywood Reporter)