A rep for James told People magazine Thursday that the claims of sex tapes are "untrue and completely fabricated."
Internet reports claimed that James and his wife, Sandra Bullock, made a sex tape together, and that he had also made at least a dozen sex tapes with other women featuring Nazi-themed paraphernalia.
Last week, Bullock, who has been laying low since reportedly moving out of the home she and James shared last month after learning of his alleged affairs, also released a statement denying the existence of a sex tape featuring her and James.
"There is no sex tape," the statement said. "There never has been one and there never will be one."
The People report states that James, 40, is still in a treatment facility, despite previous reports that he may have left rehab.