Robert Kardashian was the former national league player's lawyer when he was accused of murdering his former wife Nicole Brown Simpson and her friend Ron Goldman. The rumor has never been substantiated.
In a video obtained by TMZ, a cameraman asks if congratulations are in order, now that Khloé has announced her pregnancy.
"But I don't know for me. I don't think for me I have nothing to do with it", Simpson said.
Simpson goes on to say, "Congratulations to her, but trust me I had nothing to do with it". A conspiracy theory claims OJ and Kris Jenner were up to some bedroom action back in the day. I'm so hurt she needs to deal with this all.
Robert Kardashian famously defended O.J. Simpson during his murder trial
But reports that O.J. Simpson, a close friend and client of Robert's, is Khloe's father have been circulating since at least 2012.
In Kris' memoir she admits to cheating on her first husband, but does not name who with. Soon after the rumors rocked Hollywood, Khloe, Kim Kardashian, 36, and Kris Jenner, 62, all took to Twitter to laugh off rumors that Simpson was Khloe's real father. "I gave birth, I know who the dad was".
Khloe's paternity was also a storyline during Season 7 of "Keeping Up With the Kardashians". I was like, 'Listen, you can talk about me and my sisters all you f**king want.
Robert's second and third wives have also fanned the flames, saying that he outright told them both that Khloe is not a Kardashian.
Simpson was sentenced to 33 years for armed robbery for attempting to steal sports memorabilia in 2008, and was released last year.