*”Smallville” star Sam Jones III is taking legal action to keep from a DVD’s release of a super hot sex tape featuring the actor and his Playboy model girlfriend Karissa Shannon.

Vivid Entertainment boss Steve Hirsch has footage of the couple’s bedroom antics from “a reputable third party” and is seeking to sell the adult video, which he has branded “extremely erotic.”

But the couple (above) is not ready for that type of exposure. Jones and Shannon are filing suit against the media mogul to keep from the tape ever reaching the public.

Jones tells TMZ.com:

“I understand that the guy from Vivid saw footage with Karissa and I in it. We have spoken to our legal team and they will be dealing with this ASAP.”