By Pamela Gocobachi
December 13, 2013 at 10:15 PM EST

Reality TV personality Khloe Kardashian has filed for divorce from her husband of four years, Lamar Odom, People reports.

The news of the split comes hot on the heels of the speculation that Odom’s recent substance-abuse issues are to blame for the strain on the couple’s marriage.

Rumors that the couple were headed for divorce have been swirling since reports surfaced in September that the 29-year-old Kardashian and the 34-year-old former Laker had been living apart after the two had not been publicly seen together in weeks.

Odom received three years’ probation after reaching a plea bargain in his August DUI case. Additionally, the former basketball player has a history of drug-related incidences and has been dogged with relapse rumors since his DUI arrest.