Kim Kardashian is planning a blowout wedding to New Jersey Nets forward Kris Humphries.
"People keep asking us, 'When is it?' She doesn't know," Khloé told People.com at the Forbes Celebrity 100 event. "But you know, Kim goes big. It's not going to be small. And I joke and I say it will be like the Royal Wedding, because she is just like that." GALLERY: See Kardashian Inc. in pictures
Khloe's wedding to Lamar Odom was taped for an E! special, and Kim’s will likely play into their franchise of reality shows on the network as well.
"I'm looking forward to being in the wedding," Khloe said. "I don't want to help because Kim is going to be such a bridezilla! If I do one thing wrong, I'll be screwed! But I would love to be in the wedding."
She expects to be a bridesmaid. "[Kourtney and Kim] were both my maids of honor, so she has to do the same for us," Khloé said.
Her husband, who plays for the Los Angeles Lakers, is pleased another NBA star is joining the family, but says what really matters is "if she's happy. Whether he's an NBA player, a fireman, a policeman, whatever it may be, as long as she's happy."
The Hollywood Reporter revealed earlier this month that People magazine paid $300,000 for Kardashian's engagement photos. A rep for the reality star had no comment.
The Kardashians earned $65 million last year.