Jack Nicholson (amezaliwa tar. 22 Aprili 1937 mjini Neptune, New Jersey) ni mwigizaji wa filamu kutoka nchini Marekani. Awali alianza kama mtunzi na mshiriki wa kujiegesha. Ameanza kuwa nyota mnamo 1969 pale alipotua na katika kijisehemu kidogo cha katika filamu ya Easy Rider. Miongoni mwa filamu zake nyingine ni pamoja na Five Easy Pieces (1970), Carnal Knowledge (1971), Tommy (1975), One Flew Over the Cuckoo's Nest (1975), The Shining (1980), Batman (1989), Mars Attacks (1996), As Good as it Gets (1997), About Schmidt (2002), na Anger Management (2003). Jack Nicholson at the Internet Movie Database Jack Nicholson Online