(Reuters) - A federal judge on Tuesday declared unconstitutional a California law requiring IMDb, the movie and television information website, to remove actors? ages at their request. District Judge Vince Chhabria said the law violated the First Amendment rights of IMDb, a unit of Amazon.com Inc that challenged the law, by singling out age data for special treatment, despite being intended to serve the compelling interest of curbing age discrimination in Hollywood. ?Regulation of speech must be a last resort,? the San Francisco-based judge wrote. It drew support from SAG-AFTRA, a union representing some 160,000 actors, broadcast journalists and other media professionals, which plans to appeal.