Hollywood’s actors’ union filed an unfair labor practice charge against Llama Productions on Monday, alleging the company replaced actors’ work by using artificial intelligence to generate Darth Vader’s voice in Fortnite without notice.

The union claims that Llama Productions failed to notify the labor group and negotiate when it began employing a James Earl Jones voice that replaced the work of members.

The SAG-AFTRA has registered a complaint against Fortnite for the use of AI for the voice of Darth Vader. Here are all the details.