The reality TV star will reportedly wed on Sunday (27Sep09) in front of 200 guests at the family friend's mansion.
A source tells People.com, "It will be a very detailed and classy affair."
Kardashian's big sister Kim has given her soon-to-be brother-in-law her seal of approval and is excited to have the Los Angeles Lakers star as part of the family.
She says, "Lamar is an amazing person, he's gotten to know all of us and we've spent a lot of time with him. He's so much fun, such a good guy."
The couple has yet to confirm the wedding reports but is said to have registered for gifts at luxury homeware stores Williams-Sonoma and Gearys Beverly Hills.
Meanwhile, Kardashian's mother Kris Jenner insists she's not surprised the wedding in taking place just a month after her daughter started dating father of two Odom.
She adds, "That's how Bruce (husband Bruce Jenner) and I met. We met (and) we were married four months later. You just go by what you feel."