Why seek many actors for a film if you can ask those you have already got to play multiple roles? Indeed, there are many examples where the same actor portrayed more than one characters, but we are interested in those where a viewer could not realize it.
There won’t be the films on this list in which an actor plays twins or similar characters, only the ones where the same actors played completely different roles in a single movie.
1. Jeremy Bulloch — Star Wars: Episode V The Empire Strikes Back (1980)
Characters: Lieutenant Sheckil / Boba Fett.
2. Jonathan Hyde — Jumanji (1995)
Characters: Samuel Alan Parrish / Hunter Van Pelt.
3. James Remar — Django Unchained (2012)
Characters: Ace Speck / Butch Pooch.
4. Jack Nicholson — Mars Attacks! (1996)
Characters: President James Dale / Art Land.
5. Eddie Murphy — Coming to America (1988)
Characters: Prince Akeem Joffer / Randy Watson / Saul.
In all, he played 4 roles in the film.
6. Peter Sellers — Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb (1964)
Characters: Dr. Strangelove / President Merkin Muffley / Group Captain Lionel Mandrake.
7. Ryan Reynolds — Deadpool 2 (2018)
Characters: Deadpool / Juggernaut.
8. Benedict Cumberbatch — Doctor Strange (2016)
Characters: Stephen Strange / Dormammu.
9. Cheech Marin — From Dusk Till Dawn (1996)
Characters: Border Guard / Chet Pussy / Carlos.
10. Warwick Davis — Harry Potter film series (2001-2011)
Characters: Filius Flitwick / The Head Goblin / Griphook.
11. Jason Isaacs — Peter Pan (2003)
Characters: Mr. Darling / Captain Hook.
12. Hank Azaria — Night at the Museum: Battle of the Smithsonian (2009)
Characters: Kahmunrah / The Thinker / Abraham Lincoln.
Bonus: the actors of Cloud Atlas (2012). Hugo Weaving
Characters: Bill Smoke / Nurse Noakes / Old Georgie.
In all, this actor (and the ones we mentioned below) portrayed 6 characters in the film, but these three were the most vivid.
Characters: Rev. Giles Horrox / Seer Rhee / Kona Chief (6 roles in total)
Characters: Dr. Henry Goose / Dermot Hoggins / Isaac Sachs (6 roles in total)
Characters: Jocasta Ayrs / Ovid / Meronym (6 roles in total)
Can you remember more examples where one person played many roles just in one film?