In addition to winning Academy Awards for best picture, best director, and best supporting actress (Celeste Holm), "Gentleman's Agreement" was one of Fox's highest-grossing movies of 1947. The political nature of the film, however, upset the House Un-American Activities Committee, with Elia Kazan, Darryl Zanuck, John Garfield, and Anne Revere all being called to testify before the committee. Revere refused to testify and although Garfield appeared, he refused to "name names". Both were placed in the "Red Channels" of the Hollywood Blacklist. Garfield remained on the blacklist for a year, was called again to testify against his wife, and died of a heart attack at the age of 39 before his second hearing date.