Joan Carol Gratz is an American artist, animator, and filmmaker who specializes in clay painting. Gratz is best known for her 1992 Oscar-winning animated short film Mona Lisa Descending a Staircase.
Biography：Joan Carol Gratz is an American artist, animator, and filmmaker who specializes in clay painting. Gratz is best known for her 1992 Oscar-winning animated short film Mona Lisa Descending a Staircase.
