Kim Kardashian Files for Divorce from Kris Humphries

That was fast!

Kim Kardashian filed for divorce Monday just 72 days after tying the knot with Kris Humphries in a lavish ceremony that was taped for her reality show.

"I've spoken to her briefly and she says she's sad and got caught up in all that was going on," Ryan Seacrest, who produces her show, said on his KIIS-FM radio program Monday morning.

Related: Kris Humphries Blindsided by Divorce

Kardashian, 31, lists the date of separation as Oct. 31, 2011, and cites the usual "irreconcilable differences," according to her Los Angeles Superior Court filing.

Gallery: Kim & Kris's Very Public Romance

She also says the couple has a prenuptial agreement and she doesn't want to pay spousal support to Humphries.

Humphries is said to have been completely blindsided by Kim's decision to file divorce papers. Humphries told TMZ.com, "I love my wife and am devastated to learn she filed for divorce," revealed the basketball player. “I'm willing to do whatever it takes to make it work," he added.

Kim Kardashian and Kris Humphries just over a week ago, celebrating her 31st birthday

Kim Kardashian has opened up – just a little – about why she's ending her 72-day marriage to Kris Humphries. The reality TV star released a statement earlier, saying:

"I hope everyone understands this was not an easy decision," she says in a statement to E!, which airs her reality shows. "I had hoped this marriage was forever, but sometimes things don't work out as planned. We remain friends and wish each other the best."

Related: Kim Kardashian's Wedding Photos

Kim's eldest sister Kourtney took to her blog to share her take on the shock news. “Our sister is going through a difficult time but we’re a close family and are sticking together like always," wrote Kourtney, 32. She added: "Kim, we love you."

Kim's younger sister Khloe, 27, who is happily married to LA Lakers star Lamar Odom, also reached out to Kim via her blog: “I just want to thank all of our amazing fans for your unconditional love and support," she said. "My sister is going through a very difficult time and your kindness right now means the world to all of us. Kim, we love you more than anything.”

Related: Kim’s Sisters Speak Out About Her Divorce

A source close to the Kardashians tells WHO that Kim "wanted a fairy tale" but that the couple found "the pressure of the TV show just isn't what they could have handled."

Kim Kardashian on her wedding day, image courtesy of E!

The divorce news comes after weeks of speculation of trouble in their brief marriage.

Kardashian told WHO that living in New York City with her sister Kourtney, her boyfriend Scott Disick and their baby was "not ideal" for the newlyweds.

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For Halloween, Kardashian, dressed as Poison Ivy, hosted a party solo, telling WHO that her husband was not around because she was headed to Australia this week.

"Something I really prepared Kris for [was] to let him know that no matter what we do, there's going to be rumours," she told WHO. "It used to really upset me and now I don't even think about it."