Hollywood's writers union reached a preliminary labor agreement with major studios on Sunday, a deal expected to end one of two strikes that have halted most film and television production and cost the California economy billions.

The three-year contract still must be approved by leadership of the Writers Guild of America (WGA) as well as union members, before it can take effect.

The WGA, which represents 11,500 film and television writers, described the deal as "exceptional" with "meaningful gains and protections for writers."