The 'AHS' alum not only confirmed he'll be returning to Ryan Murphy's franchise as a cameo, but says Kim did pretty damn well from what he saw ... saying "She seemed really in her element, and I was really impressed by her spirit and her openness."
He says he's extremely excited to see her work in the final product -- adding she's going to do a wonderful job. Zachary even admitted, "I don’t think she needs my advice."
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As we reported, it was revealed in April that Kim K would be joining the ranks in season 12 of "AHS," titled "Delicate" -- the big announcement also revealed Emma Roberts would be returning to the long-running series, although everyone's parts are kept under wraps.