John Fiedler, who played character roles in celebrated dramas on Broadway and in Hollywood but gained lasting fame among young audiences as the voice of Piglet in Walt Disney's Winnie-the-Pooh films, died on Saturday. He was 80.

Mr. Fiedler had appeared in the Broadway production of "A Raisin in the Sun" and had played a juror on film in the drama "Twelve Angry Men" when, in the 1960's, his voice earned him the role of Piglet, the kind-hearted worrier who is Winnie-the-Pooh's best friend.

"Walt Disney heard it on a program and said, 'That's Piglet,' " James Fiedler recalled.