- M. Emmet Walsh (2 movies)
- M.C. Gainey (1 movie)
- Macon Blair (2 movies)
- Maddie Ziegler (2 movies)
- Madeleine McGraw (1 movie)
- Madeline Weinstein (1 movie)
- Madison Arnold (1 movie)
- Mads Mikkelsen (2 movies)
- Mae Whitman (1 movie)
- Maggie Gyllenhaal (1 movie)
- Magnus Krepper (1 movie)
- Magnus Millang (1 movie)
- Mahershala Ali (2 movies)
- Maia Wilson (1 movie)
- Maisie Williams (1 movie)
- Maja Aro (1 movie)
- Maja Rung (1 movie)
- Makenzie Leigh (1 movie)
- Makram Khoury (1 movie)
- Malcolm Adams (1 movie)
- Malcolm David Kelley (1 movie)
- Malcolm McDowell (1 movie)
- Malcolm X (1 movie)
- Malea Rose (1 movie)
- Malika Williams (1 movie)
- Mallory Adams (1 movie)
- Mamoudou Athie (2 movies)
- Manav Kaul (1 movie)
- Mandy Moore (1 movie)
- Mandy Patinkin (1 movie)
- Mane Andrew (1 movie)
- Manfred-Anton Algrang (1 movie)
- Manolo Rodríguez (1 movie)
- Manuel Garcia-Rulfo (1 movie)
- Manuel González-Rivero (1 movie)
- Mara Marini (1 movie)
- Maral Bani Adam (1 movie)
- Marc Chouen (1 movie)
- Marc Maron (1 movie)
- Marc Marron (1 movie)
- Marcelo Alonso (1 movie)
- Marcia De Rousse (1 movie)
- Marcia Gay Harden (1 movie)
- Marcia Jean Kurtz (1 movie)
- Marcial Tagle (1 movie)
- Marco Pérez (1 movie)
- Marcos A. Gonzalez (2 movies)
- Marcus Henderson (2 movies)
- Mare Winningham (1 movie)
- Margherita Buy (1 movie)