"I knew it was going to happen because he had shared that with me. So I had a dinner right after," Jenner told UsMagazine.com at a press conference on Wednesday for 'Keeping Up With The Kardashians.'
Khloe revealed everyone else was in the dark. "None of [the rest of] us knew," she said. "We were all sitting there like, 'Kim is so late for dinner and we're starving.' And we're like, 'Where the hell is Kim?'"
"Then she walked in, and we're like, 'Oh my God!'" Khloe said. "But we just thought we were going to a family dinner."
Khloe, 26, also talked about how she hope the newly engaged couple won't rush to the altar. "That's where Hollywood is so weird," she said. "She just got engaged. Now people are like, 'Oh my God, where's she getting married?' Most engagements are typically a year... No one has discussed it yet. We're happy that they're engaged."