William Everett "Bud" Luckey (July 28, 1934 -- February 24, 2018) was an American animator and actor. He best known for his work at Pixar, where he worked as a character designer on a number of films, including Toy Story, Boundin', Toy Story 2, A Bug's Life, Monsters, Inc., Finding Nemo, Cars and Ratatouille. Luckey was also known as the voice of Rick Dicker in The Incredibles, Chuckles the Clown in Toy Story 3 and as Eeyore in the 2011 Winnie the Pooh film.

Who is the voice of the clown in toy story 3? Let's have some stream of consciousness first.
To answer the question, consider the following: Luckey was also known as the voice of Rick Dicker in The Incredibles, Chuckles the Clown in Toy Story 3 and as Eeyore in the 2011 Winnie the Pooh film. So, the answer is William Everett '' Bud '' Luckey.