O.J. Simpson believes Khloe Kardashian is really his daughter and has changed his will to benefit her, the National Enquirer reports, claiming sources close to him. 

Khloe Kardashian, the youngest of the Kardashian sisters, always seems to be the subject of bizarre rumors, and the latest one pins O.J. Simpson as her secret father.

Kris Jenner, the matriarch of the Kardashian family, famously cheated on her first husband, the late Robert Kardashian -- a close friend of Simpson's -- and had Khloe soon after. It's been widely speculated that Robert Kardashian was not actually Khloe's father, and O.J. Simpson and even Jenner's hair stylist have been touted as candidates.

Robert Kardashian was one of Simpson's attorneys in his 1994-95 murder case and the Kardashian family had close ties with both him and his slain ex-wife, Nicole Brown.

Even though the typically attention-hungry Khloe has been trying to lie low, Celeb Dirty Laundry brought her paternity question back into the limelight after sharing the National Enquirer story last week.

O.J. Simpson changed his will to include Khloe Kardashian, the site stated, without offering proof.

The site said Simpson was ruled out as Kardashian's father because her skin is much lighter than his, even though it is darker than her mother's. In fact, Khloe looks nothing like the former professional football player and wife-murder defendant.

According to the National Enquirer, "O.J. believes Khloe is his natural-born daughter through his affair with Kris Jenner when she was married to his buddy Robert Kardashian -- and he wants to do something about it."

The source at the Enquirer continued, "At 65, he's tired and becoming increasingly aware he may not ever leave prison alive. He says he wants to 'do the right thing.'"

Another insider who is reportedly close to the situation talked about Simpson's daughter, Arnelle, "They [his children] think he is a real jerk for taking out everything on Ar­nelle, who uprooted her life in Los Ange­les to move to Florida to take care of him. By cutting Arnelle out of his will, his kids feel O.J. is being cruel. And they think that adding Khloe is just plain revenge. I'm sure if O.J. kicks the bucket and leaves Khloe money in his will, she's not going to turn it down."

O.J. Simpson is currently serving a 33-year sentence for armed robbery and kidnapping in a failed attempt to recover sports memorabilia from two collectibles dealers and could be behind bars until he is 98 years old if he can't get paroled. 

It has not been reported that O.J. Simpson changed his will, let alone changed it for Khloe Kardashian, by sources other than the National Enquirer.