After previous reports threatening a strike, the actors who provide the voices for The Simpsons in Mexico began their strike on Wednesday. They say the dubbing company wants to cast cheaper actors from outside their union, the National Actors Association. The actors picketed the offices of the company, Grabaciones y Doblajes Internationales, blocking entry to the non-union actors. “For now we have to keep up the strike there,” said Patricia Acevedo, 45, the voice of Lisa Simpson. The actors normally start recording in January but negotiations have broken down. The company has said it is struggling to remain competitive because of the union’s actions. “With attitudes like these, our country has lost ground for dubbing in Latin America,” the company said. Humberto Velez, the voice of Homer Simpson, has said he earns about 600 pesos ($54, £28) per episode and felt obliged to stand up for his union.