The reality star filed the papers on Thursday, citing irreconcilable differences.
“This was always the plan. The divorce has never been officially off. Khloé was waiting for the timing to be right,” a source tells PEOPLE.
Kardashian first filed for divorce in December 2013, but she called off their protracted divorce following Odom’s overdose in October 2015.
Though Kardashian has been supporting Odom and many thought the pair would try again, the starlet had other plans.
“A divorce was a long time coming. She was loyal for a long time and taking care of him, but she’s not a babysitter and needs to move on with her life,” a second source tells PEOPLE of the divorce filing.