Delevingne joins already cast Kim Kardashian andAHSregular Emma Roberts.
Details of her character are unknown.
The latest installment of the Ryan Murphy and Brad Falchuk series is being written and showrun by Halley Feiffer.
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She also recently released the documentary seriesPlanet Sexfor Hulu on which she also served as executive producer.
Delevingne is repped by Ocean Avenue Entertainment and SOWDLLP.
Calls to FX for comment remained unanswered.
