Mickey Rooney was supposed to star in this movie but Rooney ended up being drafted into the war, so Robert Walker was cast instead.
M-G-M saved money by utilizing the same main set as the one from "Weekend at the Waldorf" (1945). When that company finished, "Her Highness and the Bellboy" moved in.
This was Hedy Lamarr's last film she did for MGM under her contract. After this she went on to free lance.