UPDATE 1-Striking Hollywood writers rally as pressure mounts

(Adds details on Leno and DeGeneres shows; confirms talent agency meeting)

By Steve Gorman and Dana Ford

LOS ANGELES, Nov 9 (Reuters) - Thousands of Hollywood screenwriters on strike against film and TV studios rallied outside 20th Century Fox on Friday in their biggest collective show of force yet as pressure mounted on both sides to resume contract talks.

With the walkout in its fifth day, tensions also rose for popular TV hosts Jay Leno and Ellen DeGeneres, whose talk shows became the latest battlegrounds of a labor confrontation over how screenwriters get paid for work on the Internet.

DeGeneres drew a scathing rebuke from the East Coast wing of the Writers Guild of America for returning to work on her syndicated daytime show after honoring picket lines the first day of the strike.

But DeGeneres, a member of both the Writers Guild and its sister union for TV performers, the American Federation of Television and Radio Artists, drew support from AFTRA and producers of her show. Both denied WGA East claims the popular TV star was breaking strike rules.

Meanwhile, NBC said producers of "The Tonight Show with Jay Leno" were mulling a number of options for bringing that program back on the air, possibly with its first guest hosts since Leno took over the show 15 years ago if he refuses to cross the picket line himself.

The same was true, a network spokeswoman said, for NBC's "Late Night with Conan O'Brien" and "Last Call with Carson Daly." All three NBC late-night shows went into immediate production hiatus, with reruns airing in their place, on the first day of the strike.

The non-writing staff of the three shows have been informed they face layoffs at the end of next week unless those shows return, NBC said.