To the chagrin of many 90210 fans, the Kardashian sisters will guest star on the third season finale of this CW drama.

Earlier this week, filming on that episode was completed, as Kim and Khloe posed for a photo with star AnnaLynne McCord. Khloe then posted the following message on her blog:

AnnaLynne McCord was  sooo sweet -- she really made it fun and easy for us. I obviously couldn't leave there without asking her to take a pic with us. How gorgeous is she?!?

This was my first acting stint. Memorizing lines is not really my thing but we did it and I'm honored and thrilled! Thank you to all of the amazing people at 90210.

Are you excited for these siblings to appear on 90210?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.