Mad Men star Jon Hamm is joining the voice cast for the Despicable Me spinoff, Minions, according to Deadline Hollywood.
Hamm will voice a character named Herb Overkill, an inventor and husband of the animated film’s world-domination-obsessed villain Scarlet Overkill (Sandra Bullock).
Minions focuses on the adorable, often unintelligible creatures that worked for Gru in Despicable Me. The film depicts the tiny henchmen in the 1960s without a evil master to serve. This film will follow the summer release of the sequel to Despicable Me, Despicable Me 2 .
Minions is set to be released on Dec. 19, 2014.