Lamar Odom reportedly wants Khloé Kardashian back.

The 29-year-old reality TV star filed for divorce from her husband in December following rumours he was addicted to cocaine and cheated on her multiple times, but the 34-year-old basketball star is allegedly refusing to sign the legal papers because he thinks there's still hope of saving their four-year marriage.

A source told Life & Style magazine: ''Lamar wants Khloé back. He does not want to end the marriage, and that's why he won't sign the divorce papers. He just won't let her go. He's sober and back on track now -- and thinks he can get her back.''

Meanwhile, Khloé has made it obvious she doesn't want to rekindle her romance with Lamar after she recently went public with her new boyfriend French Montana, 29.

However, the brunette beauty's family - especially her sister Kim Kardashian and stepfather Bruce Jenner - are reportedly concerned that the rapper could be using her to boost his celebrity profile.

A source said previously: ''[They] are very skeptical of him. They think he's using Khloé for fame.''

The couple have been virtually inseparable since April, aside from the week Khloé spent in Paris and Florence for Kim, 33, and Kanye West's wedding last month, and most recently took a trip to South Africa together for the MTV Africa Music Awards earlier this month.