List of Ben 10 characters
- This table shows the recurring characters and the actors who have portrayed them throughout the franchise.
- A dark grey cell indicates the character was not in the series or film, or that the character's presence in the series or film has not yet been announced.
- A Y indicates an appearance as a younger version of a pre-existing character.
- A C indicates a cameo appearance.
- A P indicates an appearance in onscreen photographs only.
- A D indicates an appearance in deleted scenes only.
- A M indicates a motion-capture role.
- A U indicates an uncredited role.
- Tara Strong - Ben 10 (as 4 and 10 years old), Ben 10: Ultimate Alien (as 10 years old in "Forge Of Creation"), Ben 10: Omniverse (as 5, 10, and 11 years old), and Ben 10 (Reboot; 10 years old and toddler)
- Yuri Lowenthal - Ben 10: Alien Force, Ben 10: Ultimate Alien, Ben 10: Omniverse (15 and 16 years old) and Ben 10 (Reboot; Elderly)
Benjamin Kirby "Ben" Tennyson (alias "Ben 10") is the main protagonist of the franchise.
- Meagan Smith - Ben 10 (10 years old)
- Ashley Johnson - Ben 10: Alien Force, Ben 10: Ultimate Alien, and Ben 10: Omniverse (11, 15, and 16 years old)
- Montserrat Hernandez - Ben 10 (Reboot; 10 years old and toddler)
Gwendolyn Catherine "Gwen" Tennyson is Ben's paternal cousin and Max's grand daughter.
- Paul Eiding - Ben 10, Ben 10: Alien Force, Ben 10: Ultimate Alien, and Ben 10: Omniverse (54, 59-60, 60-61, 64-65, and 65–66 years old)
- Adam Wylie - Ben 10 (10 years old in "Don't Drink the Water")
- Jason Marsden - Ben 10: Ultimate Alien (17 years old in "Moonstruck")
- David Kaye - Ben 10 (Reboot)
Maxwell "Max" Tennyson is a retired Plumber, the paternal grandfather of Ben, and Gwen
- Michael Reisz - Ben 10 (11 years old)
- Charlie Schlatter - Ben 10 (11 years old in later episodes)
- Greg Cipes - Ben 10: Alien Force, Ben 10: Ultimate Alien, Ben 10: Omniverse, and Ben 10 (Reboot) (11, 12, 16, and 17 years old)
- Nathan Keyes - Ben 10: Alien Swarm
Kevin Ethan Levin is an Osmosian who first appeared as one of Ben's enemies, but reformed as his best friend and Gwen's love interest.
- Bumper Robinson - Ben 10: Omniverse
Rook Blonko is a Revonnahgander from the planet Revonnah. He is a Plumber who was assigned to Ben by Max after Gwen and Kevin left.
- [cartoonnetwork.com/tv_shows/ben10/characters/index.html Ben 10 Characters official US site]