Hollywood director Bryan Singer, best known for his four successful “X-Men” movies, has been accused in a lawsuit of sexually assaulting a 17-year-old boy in 2003.

According to court documents filed Thursday in Seattle, in the northwestern state of Washington, Singer is accused of sexually assaulting Cesar Sanchez-Guzman during a party on a yacht owned by one of the director’s wealthy friends.

Singer offered to give the teen a tour of the yacht, then allegedly lured him into a room, “shut the door and demanded that Cesar perform oral sex,” the court filing reads.

When the youth refused, “Singer forced him into acts of oral and anal sex.”

After the incident, Singer allegedly approached Sanchez-Guzman and told him he was a Hollywood producer, saying “he could help Cesar get into acting as long as Cesar never said anything about the incident.”

Singer then allegedly “told Cesar that no one would believe him if he ever reported the incident and that he could hire people who are capable of ruining someone’s reputation.”

In a statement released by Singer’s lawyer to US entertainment media, the director “categorically denies these allegations and will vehemently defend this lawsuit to the very end.”