Kim Kardashian had a "magnificent "princess cake at her engagement party.

The socialite - who got engaged to New Jersey Nets player Kris Humphries last month - and broke the news to her siblings at a family dinner and, with her mother Kris Jenner already aware of the happy occasion, the group celebrated with an evening to remember.

Kim's sister Khloe wrote on her blog: "The entire family got together at my mom's house for a 'family dinner' -- none of us thought it would be any different from our usual family get-togethers.

"Kim walked in late (OF COURSE) and nonchalantly flashed that rock of hers and we all started screaming!"

"Well... It took us a few minutes to notice, but once we did, everyone started freaking out LOL. My mom obviously went all out with ponies covered in glitter and a magnificent princess cake. Would you expect any less of her??"

Khloe - who is married to sportsman Lamar Odom - said the love between the newly-engaged couple was clear for all to see.

She added: "It was such a happy night - so much love in the air," she said.