Rob Kardashian 'Hoping' for a Baby Boy in 'Rob & Chyna' Premiere Sneak Peek -- Watch!

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The reality star has a sweet reason for wanting a little boy with Blac Chyna!

Rob Kardashian wants the kind of father-son relationship his late dad, Robert, had with him.

In a sneak preview from Sunday's Rob & Chyna premiere, the expectant papa reveals to Scott Disick that he's hoping his baby with fiancee Blac Chyna will be a little boy.

"I don't know yet," the 29-year-old reveals when asked if he knows the sex. However, Rob does admit he's got fingers crossed for a boy. “You gotta carry on your name."

WATCH: Khloe Kardashian Says Rob Needs to ‘Man Up,’ Is ‘Grateful’ for Blac Chyna on ‘KUWTK’

"'Cause the whole name's gonna die down any time soon?" jokes Scott, poking fun at the famous family.

However, Rob's reason for wanting a little boy is actually very sweet, and tied to the connection he had with his own father.

"Definitely hoping for a boy, because I wanna have the same relationship that I had with my father, with my son," Rob shared.

MORE: Rob Kardashian Posts Sweet Throwback Pic With His Dad Ahead of Becoming a Father: 'Can't Wait'

And of course, without even knowing the gender, Rob admits that a name has yet to be decided on. But Scott has an idea:

"You should just name her Kim if you have a girl," the reality star joked.

Watch the clip below.

WATCH: Blac Chyna and Rob Kardashian Snap Selfies With Kim Kardashian and Kylie Jenner at Khloe Kardashian's Birthday Bash

Meanwhile, although there was initially drama, the Kardashians have become super close to Chyna since her engagement to Rob.

Watch the video below to see why Khloe Kardashian is "grateful" for her soon-to-be sister-in-law.

Rob & Chyna premieres Sunday, Sept. 11 at 9 p.m. on E!