Reality TV star Khloe Kardashian has filed for divorce from her husband, Lamar Odom.

After months of speculation, The Keeping Up with the Kardashians star has started official divorce proceedings from her husband, citing irreconcilable differences in the court petition.

The youngest of the three Kardashian sisters, 29-year-old Khloe has been married to the 34-year-old basketball star for four years, having tied the knot just 30 days after they first met.

Odom, who recently faced DUI charges, was sentenced to three years probation after entering a no-contest plea.

It has also been reported that he and Khloe have been living separately for several months.

Khloe spoke about her marriage problems on an episode of the family's reality show in November saying: "A lot's been going on in the past couple of years, just with me and Lamar, and I've made that choice myself to keep that within my marriage.

"But lately it's getting bigger than me... Sometimes things are bigger than yourself. I don't have a plan - I don't know what the next step is."