T.J. Miller is, basically, the best comedian ever; some would say "Good 'n heady". He brings depth to Tuffnut which would not have otherwise existed, and brings new layers of comedy to a wonderful Dreamworks production. Although the character's ears and hair are no indication of the man himself, T.J.'s voice stands out distinctly with his improvisation skills and meta-style comedy.
- He also plays Lucas Flannery in Transformers: Age of Extinction. His character soon got killed by a decepticon by getting dicinerated.
- He is also known for playing Fred in Big Hero 6. The film was co-directed by Chris Williams, who is a friend of Dean DeBlois.
- He is also known for playing Erlich Bachman in the TV series Silicon Valley.
- He is also known for playing Brad Slovee in High School USA!.