Mad Men star Jon Hamm recently completed treatment for alcohol addiction, his spokeswoman said.
Hamm had the support of his longtime partner, actress-filmmaker Jennifer Westfeldt, in his struggle, publicist Annett Wolf said in a statement Tuesday.
The couple have asked "for privacy and sensitivity going forward," the statement said. No further details were provided.
The disclosure, first reported by TMZ, came as the final season of the 1960s-set drama begins April 5 on AMC.
The 43-year-old Hamm plays Don Draper, a troubled advertising executive with a dark past. The role brought him stardom and repeated Emmy Award nominations.