It didn't take long after Epic Games unleashed famous Star Wars Sith lord Darth Vader into the game Fortnite -- complete with the AI-enabled voice of late actor James Earl Jones for conversations with players -- for Vader to drop the F-bomb.

The actors’ union that began striking against video game companies last summer has filed an unfair labor practice charge against Epic Games, the creator of Fortnite.

Actor union Sag-Aftra has filed a complaint over the use of artificial intelligence (AI) to recreate the voice of Star Wars villain Darth Vader in Fortnite. The union said Llama Productions - a subsidiary of Epic, which makes the hit video game - had chosen "to replace the work of human performers with AI technology".