From WENN.com

Cho insists she had a blast working with the reality TV star on the fourth season of the programme, which aired this summer (12), but the funnywoman admits she had trouble getting through the tightened security onset as a result of their high-profile co-star.

She says, ""Kim is so famous, I couldn't even get on the set! I was like, 'No, I'm on the show, trust me, I really am!' But they (security) wouldn't let me on! She's an amazing actress and everything she does is so huge so it was a big deal to have her on the set.""

Kardashian played Nikki, a love interest for Ben Feldman's character, Fred.