He was known for playing character roles and his ability to speak in numerous accents. Libertini was known for his roles in "Catch-22" (1970), "The In-Laws" (1979), "Popeye" (1980), "All of Me" (1984), "Fletch" (1985), "Fletch Lives" (1989), "Awakenings" (1990), "Lethal Weapon 4" (1998), and "Dolphin Tale" (2011).