Credit: Noel Vazquez/Getty Images Photo: Khloe and Rob Kardashian Pose With Lamar Odom at the 2011 NBA All-Star Celebrity Game

Khloe Kardashian is not pregnant, but younger brother Rob says he's eager for her and husband Lamar Odom to have a little one soon.

Thing is, Rob says, it's not easy. "[They] are trying," Rob tells "It's a tough process — it's not as easy as people think… It should happen soon, I'm hoping."

Rob says when that magic day does arrive, Khloe and Lamar's offspring will be quite the stunner — a "tall, beautiful person” — and we don't doubt it.

You'll be hearing (and seeing) more of Rob in the coming months — he's a live-in houseguest at the Odoms at the moment, and they’re filming the soon-to-debut Khloe and Lamar spin-off. So, how's the show going?

"We've been doing it for like a month now and it's going very well," he reports. "It's very entertaining. I think the show is going to be fun. Trust me, this house is crazy!"