Evan Peters accidentally flashed Jessica Lange on the set of American Horror Story back in the day!

Peters has shown skin in most of his seasons of American Horror Story, but this particular time it wasn't intentional. The actor appeared on Conan this week where he recalled filming a scene with Lange during which we he showed his junk to the legendary actress on accident.

"I basically am leaned over Jessica Lange's desk in a hospital gown, bare-a-, so I put a c- sock on," he recalled, presumably referring to a scene from American Horror Story: Asylum.

Host Conan O'Brien then informed the audience that a c- sock covers male genitalia during production on a film, when the particular scene requires partial nudity.

"I put it on, and we did the scene, and afterward, Sarah [Paulson] comes up to me, kisses me on the cheek, and is like, 'Oh, sweetheart, it's OK.'" Peters said. "And I was like, 'What, was I that bad?' And I look over and Ms. Lange is telling the P.A. that apparently my balls were in her face the whole shot. Apparently a c- sock is not just a c- sock, it's a c- and ball sock. So lesson learned. You've got to swoop down and sheathe the balls as well."

Lesson learned indeed.

On a more wholesome note, the actor's appearance on Conan this week may indicate that Peters will be appearing on the sixth season of American Horror Story very soon. Viewers have been clamoring to see the actor in this season, titled Roanoke, but he has been conspicuously missing - despite appearing in the main credits.

Peters is one of only two actors to appear in all six seasons so far of American Horror Story, the other being Paulson.

American Horror Story: Roanoke airs Wednesdays at 10 p.m. ET/PT on FX.