Rob Kardashian's weight gain has reportedly prompted the "Keeping Up with the Kardashians" star to join "The Biggest Loser." Momager Kris Jenner, meanwhile, remains positive that his son will turn out alright despite his battle with fat.

A report by HollywoodLife  said that Kris Jenner is really worried about Rob Kardashian's weight gain that she already contacted producers of "The Biggest Loser," a show about obese contestants fighting about who will lose the most weight, for the possibility of including the "Keeping Up with the Kardashians" star.

The source told the website: "With Biggest Loser being on NBC, they share a lot of the same people who make decisions with E!, so Kris has been in meetings to see if it would work to have Rob on Season 16 this fall."

"Everyone is on board for this to happen except Rob, he still needs convincing. But most people involved in the talks think Kris will get her way and have him join the show," the source added.

Recently, on "The Today Show," Kris Jenner weighed in on Rob Kardashian's weight gain and battle with fat:

"Rob's working on himself. He's going to be okay," she said. "Rob's living in L.A. right now and he's doing well, finding out what makes him tick and struggling with some stuff ... my job is to be there for him."

Khloe Kardashian, who's dating rapper French Montana, is still very supportive of the "Keeping Up with the Kardashians" star as she always "texts Rob inspirational messages all the time and has been reaching out to him nonstop since the whole wedding fiasco," HollywoodLife added.

It's been reported in various tabloids that Rob Kardashian left Kimye's wedding in a huff after a confrontation with Kim Kardashian who allegedly did not appreciate that he's not losing any weight for the ceremony.

The "Keeping Up with the Kardashians" siblings also allegedly had a spat because he didn't like the extravagance of the pre-wedding party.