Television producer Ryan Murphy, has threatened legal action against Warren Leight, a strike captain and committee member of the Writers Guild of America, according to a letter from Murphy's attorney obtained by The Hollywood Reporter.

The dispute arose when Leight alleged in a tweet that crew members working on Murphy's show American Horror Story would be "blackballed in Murphy-land" if they refused to cross the WGA's picket lines. Murphy's spokesperson denied these claims at the time. Following the letter sent by Murphy's attorney, the WGA held a meeting with Leight, who subsequently deleted the tweet and issued an apology and retraction.