He voiced Mr. Woolensworth in the 2005 Disney animated film Chicken Little, and The Great Prince of the Forest in the 2006 Disney direct-to-DVD film Bambi II. He is the only voice actor in Bambi II who was alive when Bambi was released in 1942. He also voiced the William Shakespeare statue in the 2011 Touchstone Pictures film Gnomeo & Juliet.
Stewart turned down several roles during the Disney Renaissance prior to Chicken Little due to scheduling conflicts, including King Triton in The Little Mermaid, Cogsworth in Beauty and the Beast, Zazu in The Lion King, Governor Ratcliffe in Pocahontas, and Zeus in Hercules. Stewart regards his missed opportunity with voicing Jafar in Aladdin as the greatest regret of his film career. He was mentioned in an episode of Dog With a Blog. He was also considered for the role of Francis in Disney's 1988 movie, Oliver & Company.