It was revealed yesterday (25.05.11) that the basketball star had proposed to his socialite girlfriend after just six months of dating, and the 26-year-old sportsman insists he has always known they were meant to be together.
He said: "I think probably within a month of meeting her I knew she was 'The One'."
Kim, 30, loves her fiance's sense of humour and praised him for having a "good heart".
She gushed to People magazine: "I really fell in love with him as a person - he's such a good person with a good heart. Everyone that meets him says the same thing.
"He's so funny. He has such a great sense of humour."
The reality TV star appreciates the fact that Kris can always cheer her up whenever she has a bad day.
She said: "If I've had a long day, I'm working really hard or I'm stressed, I just can't wait to come home to him.
"The time that we've spent together, we have so much fun together and he always, no matter what, puts me in a good mood."
Meanwhile, Kim's sisters Kourtney and Khloe Kardashian have admitted they expect her wedding to be televised because so much of their lives are broadcast on various shows on E!.
Kourtney told the channel: "It comes with the territory."
Khloe added: "I mean, I would assume it would be... we sell our souls to E!, but that's obviously up to Kim and Kris."
Khloe's own wedding to Lamar Odom was screened as part of reality TV show 'Keeping Up with the Kardashians', something her mother Kris Jenner - who also manages her family - is particularly happy about.
Quizzed on whether Kim's wedding will be televised, Kris said: "I have somebody waiting out in the hallway to discuss this very thing.
"This is the thing, one of the biggest joys in my life is the fact that we have Khloe and Lamar's experience on E! They filmed it and every time I watch that, I cry."