The 52-year-old former NBA star is reportedly being treated for an alcohol problem and a source tells TMZ he is "beyond exhausted and overwhelmed."
This isn't Dennis' first stint in rehab. He appeared on VH1's Celebrity Rehab with Dr. Drew in 2009, where he was also treated for an alcohol addiction.
Dennis most recently made headlines after his controversial trip to North Korea, where he played in a basketball game with other former NBA players, which he said was a "birthday present" to dictator Kim Jong Un.
During a subsequent CNN interview about the incident, Dennis completely blew up and caused a scene, which he later apologized for and said he had been drinking.
We wish him all the best in his recovery.