The former best friends - who used to be frequently photographed together at events - did not speak to each other at the second anniversary party of LAVO in Las Vegas on Friday (13.08.10), despite being seated together.
A source told HollywoodLife.com: "Paris arrive at around 3am and was on the same table as Kim but they remained frosty and didn't look at each other or even speak."
Although reality TV star Kim arrived early and stayed for the entire party, the blonde heiress addressed the crowd briefly to wish LAVO and the owner Noah Tepperberg a happy birthday before leaving the venue.
Kim didn't appear to be upset by the snub and insisted she had enjoyed the bash.
She tweeted afterwards: "What a fun night in Vegas with @JonathanCheban!!! In LA already but might go back for round 2! (sic)"
It was reported earlier this year that the pair fell out when Paris became jealous of Kim's increasing popularity.
Kim's former publicist Jonathan Jaxson said at the time: "Even when I would talk to Editors of magazines and other media outlets about featuring Kim, they would comment on how they are moving past Paris in hopes to bring someone fresh to the spotlight, like Kim."
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