14 celebs you didn’t know went to rehab – This will shock many! (With Pictures)

12. Jon Hamm – Alcohol Abuse

Jon Hamm secretly checked into rehab for alcohol abuse for thirty days in 2015. It seemed like a major stretch for known nice guy Jon Hamm to play hard-drinking Don Draper on Mad Men, but it seems like there might have been a case of life imitating art on this one.