Johnny Test is a Canadian–American animated television series produced by Warner Bros. Animation, Cookie Jar Entertainment, Teletoon Productions, Collideascope Digital Productions, Studio B Productions, Top Draw Animation and Cartoon Network Studios about the adventures of the eponymous Johnny Test, an 11-year-old boy who lives with his super-genius 13-year-old twin sisters who use as a test subject for their inventions and experiments.
- Johnny Test (voiced by James Arnold Taylor)
- Dukey (voiced by Louis Chirillo in Seasons 1-4, Trevor Devall in Seasons 5-6)
- Susan Test (voiced by Maryke Hendrikse)
- Mary Test (voiced by Brittney Wilson in Seasons 1 and 5, Ashleigh Ball in Seasons 2-4 and 6)