Khloe Kardashian is filing for divorce from Lamar Odom today, reports TMZ.

The site says Khloe will be citing irreconcilable differences, and thanks to a solid prenuptial agreement, the estranged spouses won't be squabbling over assets. The couple married in 2009 after about a month of dating. Hey, this lasted a lot longer than anyone thought ... and a whole lot longer than big sister Kim's 72-day union to Kris Humphries!

So what prompted Khloe to pull the trigger on ending her marriage? After cheating and drug allegations, apparently the bizarre video of Lamar rapping about cheating on her was the last straw. As soon as the video was posted online, Khloe stopped wearing her wedding and engagement rings, and they've been off since then.

And fueling further speculation that the duo are dunzo, Lamar had dinner with several pretty girls the other night in the valley, and Khloe's still posting cryptic tweets about love and humanity...