Alan Wray Tudyk ( TEW-dik; born March 16, 1971) is an American actor. His film work includes roles in 28 Days (2000), A Knight's Tale (2001), Dodgeball: A True Underdog Story (2004), voice and motion capture for Sonny in I, Robot (2004), and 3:10 to Yuma (2007). He starred in the black comedy horror film Tucker & Dale vs. Evil (2010). Tudyk has also appeared in the films Transformers: Dark of the Moon (2011), 42 (2013), Maze Runner: The Scorch Trials (2015) and Trumbo (2015). He has voiced characters in most Walt Disney Animation Studios films since 2012.

Tudyk's television roles include Wash on the space Western drama series Firefly (2002–2003). The show ran for one season and developed a cult following after the series aired. He reprised the role in the 2005 continuation film Serenity expanding on the events of the final episode of the series. His other roles include the 2007 English black comedy film Death at a Funeral, the sitcom Arrested Development (2005, 2013, 2019), the science fiction series Dollhouse (2009–2010), the superhero animated series Young Justice (2010–2013, 2019), and various voices on the animated series American Dad! (2011–present). Tudyk played Dr. Noah Werner on the sitcom Suburgatory (2011–2014). He also starred in the comedy series Newsreaders (2014–2015), the animated series Star vs. the Forces of Evil (2015–2019), voiced Dangerboat in the series The Tick (2017–2019), played K-2SO in the film Rogue One (2016) and its prequel series Andor (2025), Eric Morden / Mr. Nobody on the series Doom Patrol (2019), and the title character in the series Resident Alien (2021–2025). In video games he voiced Mickey in Halo 3: ODST (2009) as well as reprising his roles as K-2SO in Star Wars Battlefront (2015) and as the Green Arrow in various DC Super Hero Video Games (2013, 2015, and 2017)

Tudyk currently voices The Joker and Clayface in the series Harley Quinn and Optimus Prime in the animated series Transformers: EarthSpark. In 2024, Tudyk voiced Alex Sartorius / Doctor Phosphorus and returned as Clayface in Creature Commandos.