[3] Two of his more memorable film roles came in the comedies Fletch (1985), in which he played Chevy Chase's character's doubting editor, a role he repeated in the 1989 sequel Fletch Lives, and The In-Laws (1979), in which he played General Garcia, an insane Latin American dictator whose closest advisor was a cartoon face drawn on his own hand a la Señor Wences.
He portrayed Nosh, an electronics expert who is a childhood best friend of Burt Reynolds's character, in Sharky's Machine (1981).
He also played a traveling vaudevillian in Terrence Malick's Days of Heaven (1978), the greengrocer George W. Geezil in Robert Altman's Popeye (1980), a Hispanic priest in Best Friends (1982), the servant Giuseppe in Unfaithfully Yours (1984), spiritual advisor Prahka Lasa ("Back in Bowl!")
in All of Me (1984), the bandit Dijon in Disney's animated feature film DuckTales the Movie: Treasure of the Lost Lamp (1990), and a rabbi in Lethal Weapon 4 (1998).
From October 2011 through January 2012, Libertini appeared on Broadway as a rabbi in "Honeymoon Motel", the Woody Allen-penned segment of Relatively Speaking.