Thomas Steven Middleditch is a Canadian actor, voice actor, comedian, and screenwriter. He is best known for his role as Richard Hendricks in the HBO series Silicon Valley. He also voiced Harold Hutchins in the 2017 DreamWorks' adaptation of Captain Underpants: The First Epic Movie.
For Disney, he voices Penn Zero in the Disney XD animated series, Penn Zero: Part-Time Hero, Donny Tinselton and Bash in Big City Greens, Garnoz in Phineas and Ferb the Movie: Candace Against the Universe and Bernardo in Amphibia.
- In the Penn Zero: Part-Time Hero episode "Ultrahyperball", he wrote the story of the episode.
- He is a good friend to Ben Schwartz, who hosted the American improvisational comedy web television series Middleditch and Schwartz with him.