Paris Hilton's ex-boyfriend has dropped a $10 million slander lawsuit against the Hollywood socialite and her parents.

Rick Salamon, who was featured in a sex tape with Hilton, filed the suit last November alleging the hotel heiress and her parents "embarked on a cold, calculated and malicious campaign to portray (him) as a rapist who took advantage of a sweet and innocent girl."

Salamon's attorney Martin Singer filed papers in Los Angeles Superior Court Tuesday to dismiss the suit. No reason was given.

Singer claimed the homemade tape -- which was reportedly shot by the couple three years ago -- was stolen by Salamon's friend. Clips of it were sent to the media and the entire tape showed up on the Internet prior debut of Hilton's reality show "The Simple Life."

In the suit, Salamon had said Hilton and her parents "implied to the press" that Paris Hilton was incapacitated and was therefore sexually assaulted during the 27-minute video.

But, Salamon had said, Hilton "posed and preened"' during the video, said "hi" to the camera and even interrupted sex to answer her cell phone.

Even though Salamon's dropped his lawsuit against the Hiltons, it'll continue against Hilton publicist Siri Garber, whom Salamon said in court papers "orchestrated" a campaign against him.