Sony's "The Interview" earned $15 million from online rentals and purchases through Saturday.

The movie took in $2.8 million from 331 theaters since its opening on Thursday, and $1.8 million of that came from the weekend.

"I'm so grateful that the movie found its way into theaters, and I'm thrilled that people actually went out and saw it," said star Seth Rogen in a statement.

"We are very pleased with how it is doing both theatrically where we are seeing numerous sell-outs across the country, and online where it remains at the top of many charts" added Rory Bruer, Sony's president of worldwide distribution. In just four days, "The Interview" became Sony's most successful online film of all time.

BoxOfficeGuru.com editor Gitesh Pandya noted "Audiences who would otherwise never go to see a Seth Rogen movie were hearing about it and decided to come out to see what all the fuss is about."

Still, long-term prospects for "The Interview" at the box office remain a mystery. Pandya believes that theatrical grosses will be frontloaded, and that's at least partially attributable to the quality of the film.

"The movie is mediocre," he said. "If it were a brilliant film, the word of mouth would carry it week to week." He predicts a dramatic drop off when the holidays end.

The Associated Press contributed to this report.