From a New York Times story by John Koblin and Brooks Barnes headlined “Hollywood Writers Will Go on Strike, Halting Production”:

Hollywood’s 15 years of labor peace shattered Monday night, as movie and television writers said they would go on strike, bringing many productions to a halt and dealing a blow to an industry that has been rocked in recent years by the pandemic and sweeping technological shifts.

The unions representing the writers said in a statement that they had “voted unanimously to call a strike.” Writers will begin walking picket lines on Tuesday afternoon. Their three-year contract was set to expire at midnight Pacific time on Monday.