The 30-year-old reality star makes her comments in an interview with US Cosmopolitan.
And the magazine claims that Kardashian even suggested she could have tied the knot by the time the August issue goes on sale.
The Kourtney & Kim Take New York star got engaged to her 26-year-old basketball player beau Kris Humphries in May, after dating for just six months.
But she says: “When you know you want to spend your life with someone, why wait?
“Plus Kris has time off over the summer from playing basketball, so it makes sense.”
The Keeping Up With The Kardashians star – who has made no secret of the fact that she wants to get married and have children in the past – says she knew early on that she wanted to marry the New Jersey Nets player.
“I knew he was The One,” she says. “Often in relationships, you try to mould yourself into someone you think the guy wants.
“But with Kris, I was totally myself from the get-go.”
She adds: “And he was everything I’d ever wanted in a man. It all just worked.”