AceShowbiz - While her father Rob Kardashian is not so comfortable with being under the spotlight, his daughter Dream Kardashian is reportedly so well aware of her fame. The 8-year-old girl has butted heads with her classmate, Cory Wharton's Ryder, over who is more famous.

In a recent episode of the official "Challenge" recap podcast, Cory revealed the two young girls' argument over their families' respective levels of fame. "Dream and Ryder were getting into an argument over who's more famous," the 33-year-old reality TV star said. "These girls are in second grade!"

"The Challenge" star admitted he immediately advised his daughter to concede the fight against Dream. "I'm like, 'Ryder, don't you ever argue with a Kardashian on who's more famous. We're gonna step to the side on this argument next time,' " he recalled.

Cory added of how he would handle this situation, "For me, I've had to humble Ryder a little bit. All she's known is television. We also shoot 'Teen Mom', it's not a secret. She would just say, 'My dad's on TV.' She doesn't say reality star or an athlete, just, 'We're on TV.' "

"You always want to make sure, especially my little ones, that they are humble about it," the personal trainer based in Santa Monica, California continued. "I don't think they view me as being cooler. I just think it's what we do."

Dream is the only child of Rob, whom he shares with his ex Blac Chyna. While Rob no longer appears on his family's reality series, Dream is frequently featured on Hulu's "The Kardashians" along with her famous aunts Kim Kardashian, Khloe Kardashian, Kourtney Kardashian, Kendall Jenner and Kylie Jenner, as well as grandmother Kris Jenner.

Meanwhile, Ryder is the daughter of Cory and his ex Cheyenne Floyd. The former football star is best known for appearing on MTV's "Real World" and multiple seasons of its spin-off series "The Challenge", as well as "Teen Mom OG".