Khloe Kardashian and Lamar Odom Wedding to Be 'Classy Affair'
09/22/2009 AT 01:55 PM EDT
The reality star and basketball player, who met just one month ago at a party in L.A., only announced on Monday their plans to get married this weekend.
Formal invitations will be sent out mid-week to the 200 or so guests, including many of Odom's teammates and such Hollywood A-listers as Ryan Seacrest, who is an executive producer on both of the E! series Keeping Up with the Kardashians and Kourtney & Khloe Take Miami.
"It will be a very detailed and classy affair," one source says of the wedding.
And what does big sister Kim Kardashian think of her future brother-in-law? "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," she told PEOPLE over the weekend in Las Vegas at the grand opening of Pink's Hot Dogs.