Curious George is a 2006 American traditionally animated adventure family comedy film based on the book series by H.A. and Margret Rey. It stars Will Ferrell, Drew Barrymore, Dick Van Dyke, David Cross, Eugene Levy, Joan Plowright, and Frank Welker as the title character. Matthew O'Callaghan directed (after replacing Jun Falkenstein). It features new songs by Jack Johnson. This project had been under development at Imagine Entertainment for a long time, dating back at least as long ago as 1992 (and possibly many years before this). The screenplay was written by Ken Kaufman, with a story by Kaufman and Mike Werb. Although it is a traditionally animated film, about twenty percent of it takes place in 3D environments that were computer-generated. It was the first Universal Pictures theatrically released feature-length animated film since 1995's Balto, and Imagine Entertainment's first animated film. Due to the success of the film, the franchise was adapted to a TV series on PBS Kids, with Jeff Bennett replacing Ferrell as the voice of the Man with the Yellow Hat.