According to a source for Perez Hilton, Rob Kardashian has checked himself into The Meadows rehab facility for depression issues. The source explained:

“Rob has been checked into The Meadows for about a month for substance-abuse issues.”

While the Kardashian clan was riding elephants in Thailand, Rob was reconnecting with Khloe Kardashian's estranged ex-hubby Lamar Odom since he is attempting to overcome his own addictions.

Rob, pictured second from right.

The source continued:

“[He] has completely retreated from the family, and from his friends. But within the last few weeks, Rob has reconnected with Lamar.”

Does this mean Rob won't be at Kim Kardashian's Parisian wedding??! Considering how much his family is filmed and talked about constantly, Rob has seemed to be the black sheep of the family. And, maybe that feeling has started to weigh on him.