The Writers Guild of Great Britain (WGGB), which is affiliated to the TUC, has pledged its support to the 12,000 members of the Writers Guild of America who have been on strike since last week.
The Writers Guild has called on all of its members and all British writers to refuse to break the strike by filling in for US writers in dispute.
The members of the Writers Guild of America are striking to get better payments when the shows they write are resold as DVDs, internet downloads and mobile phone transmissions.
Strikers are picketing the major studios.
Over 4,000 writers rallied at Fox Plaza in Los Angeles on Friday of last week.
The strike is hitting the studios hard and a number of shows have shut down completely.
The strike is winning support from the US public.
A survey found that 69 percent of people in Los Angeles back the writers, with just 8 percent supporting the studios.