The shock announcement followed the website being labelled the most popular illegal site in the world following a recent investigation by the Motion Picture Association of America (MPAA).
MPAA executive vice president and chief of global content protection Jan van Voorn said the popular illegal movie site was run from outside of the US.
"Right now, the most popular illegal site in the world, 123movies.to (at this point), is operated from Vietnam, and has 98 million visitors a month," he told VN Express.
The comments came while the MPAA was in Vietnam as part of a global campaign to deal with illegal piracy sites.
"There are more services like this," he said. "Vietnamese people need to understand that making a movie is not free of charge. Companies have to pay a lot to bring these works to the audience."
123movies has previously attracted the attention of the office of the US Trade Representative, having been listed in its latest Notorious Markets report which highlights markets engaging in and facilitating substantial copyright piracy and trademark counterfeiting.
Last year the US Ambassador to Vietnam also requested the local Government criminally prosecute 123movies and other piracy sites running from the country.
While the MPAA are happy to label 123movies as the largest piracy site in the world, TorrentFreak discovered the 98 million monthly users feel short of the Pirate Bay's estimated 282 million visitors during the same period.