Guess Who? was a quiz show that awarded war bonds and, following the war, cash prizes to contestants who correctly idintified the recorded voices of leading personalities from business, politics, and show business.

The initial broadcast aired on August 11, 1943 over the Mutual network, sponsored by Sheffield Farms Milk.

Peter Donald, Happy Felton, Walter O'Keefe, and Danny Webb all took their tuen as emcee. Music was under the direction of D'Artega and Joe Ripley announced.

The popular format kept contestants and the radio audience guessing until the final broadcast on April 30, 1949.