Walt Disney Studios, which produced the film, plans to open the movie in 53 territories, mostly in the weeks soon after its American debut. Given the price tag for "King Arthur" of nearly $120 million, Richard W. Cook, the chairman of the studio, said having stars who are popular abroad was more important than ever.

"If we thought it would only reach a domestic audience, we wouldn't have made it," Mr. Cook said.

As Hollywood stakes more of its success on selling films abroad, filling starring roles with international celebrities is becoming more common. "Around the World in 80 Days," which opened recently in a limited number of countries, is a United Nations of actors, including stars like Jackie Chan from Hong Kong and Steve Coogan from England, as well as cameos by the German film director Wim Wenders and Gov. Arnold Schwarzenegger, who plays a Turkish prince. The movie has failed to ignite with moviegoers here, making it even more critical for the movie's investors to recoup their investment abroad.

"Hiring international talent is a movie-making law," said Stephen Moore, president of international film and home entertainment for Twentieth Century Fox. "It makes a great difference to us and certainly helps our ability to promote a movie."

As recently as two years ago, international ticket sales were around 40 percent of the worldwide box office, studio executives say. Today, international sales more often account for 60 percent or more of box-office receipts. And as production budgets soar - some as high as $200 million - and the number of big-budget movies rises, the pressure on worldwide sales is growing.

In "Troy," Brad Pitt, whose movies have rarely earned more than $100 million at the domestic box office, was cast as Achilles largely because of his international appeal, studio executives at Warner Brothers Pictures said. He starred alongside Eric Bana, who plays the sympathetic Hector and is well known in his native Australia; the British actor Orlando Bloom, one of the latest heartthrobs for teenagers, played Paris.

Consider, too, last December's "The Last Samurai." That movie brought in $111 million at the domestic box office, which was disappointing given its $140 million production budget. Then, many in Hollywood predicted the movie would lose money. Instead the movie exceeded expectations in Japan, bringing in $127 million. That raised the worldwide total to $455 million, which the studio says, after adding in pay-television rights and DVD rentals and sales, made the movie profitable.

Jeff Robinov, president of production at Warner Brothers, which is owned by Time Warner Inc., said the Japanese actor Ken Watanabe was hired for the film because he was widely recognized in Japan and would attract moviegoers there. "Clearly, the market responded," Mr. Robinov said.

But the changes in casting seem also to reflect an underlying shift in global attitudes toward American popular culture. In the 1980's and early 1990's, movies that sold well abroad starred distinctly American heroes, like Sylvester Stallone of the "Rambo" series and Bruce Willis in the "Die Hard" movies. Foreign stars were relegated to small parts, most often the villain who dies at the end. And American action films were popular because of little dialogue, lots of special effects and easy-to-follow plots.

Many in Hollywood think that tastes shifted after the terrorist attacks on Sept. 11, 2001, and the subsequent invasion of Iraq.

"Anything with a U.S. bent won't get made," said Bill Mechanic, who worked at both Disney and Fox. Added the producer Graham King, who bought the overseas rights to "Gangs of New York" for $65 million: "Since 9/11 there has been a definite change and the genres have opened up."

Two of those genres are the family film and the old-style epic, both blissfully free of modern politics. China, for instance, where the government imposes strict standards on foreign imports, is interested in movies which are apolitical, family driven and not particularly violent, Mr. King said. This summer's imports don't disappoint, including the latest "Harry Potter" movie and the sequels to "Spider-Man" and "Shrek."

Studio executives say that movies are also being released far more quickly overseas, chiefly out of fear that pirated copies of movies will be selling on street corners before the movies hit theaters and because of the increasingly saturated market for entertainment news fueled by the Internet.

"Information is traveling faster and the international audience is now more aware of event films in the United States," said Veronika Kwan-Rubinek, president of international distribution for Warner Brothers.

Some industry analysts suggest that Warner Brothers released the second and third installment of "The Matrix" worldwide in part to circumvent bad publicity about the films and earn as much money as possible in the film's opening weekends. (Warner executives deny this.) But studios have taken such an approach before. In 1997, Sony Pictures Entertainment released "Devil's Own" starring Brad Pitt and Harrison Ford, but the studio feared it would tank after it received poor reviews. Sony, a division of the Sony Corporation, decided on a worldwide release, according to Jeff Blake, a vice chairman at Sony, who said the studio was betting on foreign audiences' interest in the two stars, not the plot. The strategy worked; the movie earned $43 million in the United States and $100 million internationally.

"We went quickly out of necessity," Mr. Blake said. "It outperformed internationally and helped dig us out of a hole."

Studios, too, are expanding overseas to take advantage of the worldwide audience. In fact, Twentieth Century Fox plans to open a distribution office in Russia in six months, according to Peter Chernin, the president of the News Corporation, which owns the studio. The box office for movies in Russia, for example, is expected to hit $400 million by 2007, double what it was in 2003, according to Dodona Research, a film research company based in London.

Last year, Warner Brothers International Cinemas opened a nine-screen multiplex theater in Shanghai. And in January, it entered into an agreement with the Dalian Wanda Group, one of China's largest commercial real-estate developers, for cinemas to be built in China over the next few years.

But not everyone agrees that global releases are a path to quick profits. "It's gotten ridiculous," said Rolf Mittweg, an executive at New Line Cinema, which released the "Lord of the Rings" trilogy. Mr. Mittweg prefers a more staggered approach, which means picking the best dates, as each territory has its own peculiarities. In particular, he pointed to the opening of the global-warming disaster film "The Day After Tomorrow" in 110 territories.

"Most people open in 58 markets. They are boasting. It's not healthy for the business. These movies are killing each other off. Unless you have a film that can stand on its own, a real event, it is better to pick the best dates."

Mr. Moore of Fox said the studio chose to open in as many territories as possible (excluding Japan and Korea) because the studio did not perceive it as a New York movie even though that was where much of the action took place.

"We see it as a global movie," he said. "We added a number of iconic shots around the world like the Eiffel Tower, Tokyo." Still, he added, "It is a challenge."

So many studios are taking advantage of a quick release that the oh-so-important blockbuster first weekend has become as vital abroad as it is here. And, as in the United States, some movies in international markets are experiencing a drop in attendance after that first weekend, a disquieting trend in the view of some executives.

"Every week there is another blockbuster and movies are getting pushed off the screen quickly," said Rick Sands, chief operating officer of Miramax Films.

Andrew Cripps, president of United International Pictures, which distributes movies internationally for Paramount Pictures, Universal Pictures and DreamWorks SKG, said the May debut of "Van Helsing," released by Universal Pictures, brought in $62 million in 40 territories outside the United States its first weekend. By its second weekend, box-office sales dropped to $30 million.