Todd Joseph Miller is an American actor, stand-up comedian, producer, and writer. In 2008, he made his acting debut in Cloverfield, and from 2010 to 2019, he voiced Tuffnut Thornton in all three How to Train Your Dragon films. From 2014 to 2017, he starred as Erlich Bachman in the HBO sitcom Silicon Valley,[2] and also played Marvel Comics character Weasel in 2016's Deadpool  and its 2018 sequel, Deadpool 2. Miller also has had starring roles in films such as Yogi Bear, She's Out of My League, Transformers: Age of Extinction, Office Christmas Party, The Emoji Movie and Ready Player One.

He provided the voice for Fred in Disney's 2014 animated feature film, Big Hero 6 and reprise his role in Disney's television program, Big Hero 6: The Series.