- Mona Marshall (4 movies)
- M.C. Gainey (3 movies)
- Mac Brandt (3 movies)
- Mac McDonald (3 movies)
- Madison Arnold (3 movies)
- Mads Sjøgård Pettersen (3 movies)
- Maggie Grace (3 movies)
- Maika Monroe (3 movies)
- Maiya Boyd (3 movies)
- Malcolm Stewart (3 movies)
- Manuel Garcia-Rulfo (3 movies)
- Marc Evan Jackson (3 movies)
- Marc Vann (3 movies)
- Marcus Henderson (3 movies)
- Margaret Qualley (3 movies)
- Margo Martindale (3 movies)
- Margot Kidder (3 movies)
- Mario Roberts (3 movies)
- Mark Camacho (3 movies)
- Mark Gatiss (3 movies)
- Mark Jeffrey Miller (3 movies)
- Mark Pellegrino (3 movies)
- Mark Wheeler (3 movies)
- Mark Williams (3 movies)
- Marlene Forte (3 movies)
- Marlon Brando (3 movies)
- Martin Donovan (3 movies)
- Martin Ferrero (3 movies)
- Martin Harris (3 movies)
- Martin Jarvis (3 movies)
- Martin McDougall (3 movies)
- Marvin J. McIntyre (3 movies)
- Mary Elizabeth Mastrantonio (3 movies)
- Mary Steenburgen (3 movies)
- Mary-Louise Parker (3 movies)
- Masi Oka (3 movies)
- Mason Gooding (3 movies)
- Massi Furlan (3 movies)
- Matt Clark (3 movies)
- Matt Lucas (3 movies)
- Matt Ross (3 movies)
- Matt Smith (3 movies)
- Matt Walsh (3 movies)
- Matt Walton (3 movies)
- Matt Winston (3 movies)
- Matthew Willig (3 movies)
- Matthias Schoenaerts (3 movies)
- Matthias Schweighöfer (3 movies)
- Mattis Herman Nyquist (3 movies)
- Maureen Brennan (3 movies)