The former 'Dancing With The Stars' contestant is moving to the city in Texas to be near his sibling and brother-in-law after NBA player Lamar was traded the L.A. Lakers basketball team to the Dallas Mavericks.
Lamar told UsMagazine.com: "We'll have the whole family here!"
He added that he has been enjoying his time in the Southern State so far, adding: "Dallas is a great city. It reminds me a lot of Beverly Hills or Orange County [in California]. You can tell the city is really behind their team. It's a more relaxed atmosphere here, too, which is nice.
"I'm disappointed to leave my home, but I'm here now. I'm a Maverick."
The Kardashians and Omar will be joined by their friends Malika Haqq - who has previously had a fling with Rob - and her 24-year-old brother Khadijah, who are coming out to Texas to film reality show 'Khloe & Lamar'.
Khloe has previously said she was "sad" about her move, but put on a brave face about it and is focussing on keeping positive.
She tweeted: "We are all sad but positive energy gets you farther then negative.
"I am blessed and happy anywhere as long as I am with my family! God is great!! Blessed beyond words! I love ALL of my dolls! I am going back to being excited about life! LOL (sic)"