EXCLUSIVE! Are Kim & Kourtney Kardashian Replacing Absentee Khloe With Kelly Osbourne As Their New 'Sister'?

Now that Khloe Kardashian and hubby Lamar Odom are reportedly getting their own reality series, are Kim and Kourtney searching for a third new “sister” to complete their trifecta?

Is Khloe Kardashian’s absence at the season five premiere party of her reality show, Keeping Up With the Kardashians more proof that she’s leaving the show to create a new reality series with husband Lamar Odom? If so, her sisters have already found her replacement!

HollywoodLife.com was on the scene at Trousdale, where the show’s premiere afterparty was held August 19, and we caught Khloe’s older sisters Kourtney, 31, and Kim, 29, gushing all over none other than Kelly Osbourne! We over heard both girls squealing, “You’re our new sister, we love you!” to the 25-year-old Brit several times.

Kim even left the fete arm-in-arm with Kelly! The two girls who claimed they were “starving” made a beeline for nearby BOA Steakhouse to grab some nosh after the party – but not before Kim made the DJ play her pal Justin Bieber‘s track “Somebody to Love.”

While her sisters found her replacement, Khloe, 26, sadly tweeted from Madrid, Spain, “So sad that I’m missing the Keeping Up viewing party tonight at Trousdale!!!! My whole family is going to be there :(“

Although home network E! has never confirmed the rumors, Khloe’s new show is reportedly about the quest to – guess what – also add another new member to her family…a baby! The show with LA Lakers player hubby Lamar is said to be about her quest to get pregnant.

While you’re waiting to see what happens with the Kardashians’ dueling reality shows, watch the drama unfold when Keeping Up With the Kardashians premieres on E! August 22!