Rapper Kanye will "of course" join Kim and her relatives over the festive period, former Dancing With The Stars contestant Rob told E! News.
The 25-year-old added: "My mom ( Kris Jenner) has a really big Christmas party every year on Christmas Eve. We all sleep over at the house, and on Christmas morning we wake up at like 6am and do presents.
"They all make breakfast, all the girls. We watch basketball. It's a family day."
Sock entrepreneur Rob also said he's excited about spending time with niece Penelope, his sister Kourtney's new baby.
"I'm with the family, and that's the best part," he said.
"Everybody's been so busy. I finally get to see my little niece Penelope and it'll be nice to just hang out. I've been travelling so much."