watch 01:39 The Loop (Movies) Do you like this video? Thunk is a character in the upcoming 2013 film The Croods. He is voiced by Clark Duke. Contents[show] Background Role in film Gallery Trivia Thunk is played by Clark Duke In the movie it is learned that Thunk doesn't have a brain. Retrieved from "https://dreamworks.fandom.com/wiki/Thunk_Crood?oldid=29813" Categories: The Croods Characters Characters Males Humans Kids Sons Community content is available under CC-BY-SA unless otherwise noted.