Celebrities caricatured are (in order): Greta Garbo, Mickey Rooney, Sonja Henie, The Ritz Brothers, Shirley Temple, Clark Gable, Charlie McCarthy, The Andrews Sisters; Patty Andrews, Maxene Andrews and Laverne Andrews, Stepin Fetchit, Roland Young, Joe E. Brown, Martha Raye, Hugh Herbert, Irvin S. Cobb, Edward Arnold, Katharine Hepburn, Eddie Cantor, Slim Summerville, Lionel Barrymore, Bette Davis, Groucho Marx, Harpo Marx, Mischa Auer, Joan Crawford, Charles Boyer and of course, Donald Duck.
"The Autograph Hound" from 1939 was the first Cartoon to feature Donald's Sailor cap in blue instead of white, although the poster still depicts Donald's Sailor cap as white.
The joke of Donald climbing on Greta Garbo's limousine and making it look like he's riding inside, in "The Autograph Hound" from 1939, was reused by "Hanna-Barbera" for the "Top Cat (1961)" opening sequence.
"The Autograph Hound" from 1939 was released at the same day when "Adolf Hitler" started World War II by invading Poland, on September 1st, 1939.
"Road to Mandalay" was the working title of the first film in the "Road to ..." series, "En route vers Singapour (1940)" from 1940, starring Bob Hope and Bing Crosby, which is on the sign of the model castle in "The Autograph Hound" from 1939.