“Jon entered rehab to tackle his addiction with the support of his longtime partner, fellow actor and film-maker Jennifer Westfeldt. They have asked for privacy and sensitivity going forward,” their publicist Annett Wolf said in a statement released on Tuesday.
According to TMZ, Jon completed a 30 day program at Silver Hill Hospital in New Canaan, Connecticut at the end of February. The facility is affiliated with Yale University.
The 44-year-old actor became well known for his role as Don Draper, a womanizing advertising executive with a dark past and an addiction to alcohol.
He won a Golden Globe in 2008 for the role, and has been nominated for an acting Emmy seven times.
After an eight-year run, Mad Men’s final season will air beginning April 5, 2015.