The final sequence was filmed in color, to better show off the supposedly solid gold Cadillac driven by Laura (Judy Holliday) and McKeever (Paul Douglas). The sequence was shot on location in Rockefeller Center in New York City. When prints of the film subsequently were struck for television broadcast, the color was not reproduced satisfactorily; so as to save on expenses, for several decades, this sequence was seen on television only in black and white. The original color print finally was restored for home video in the 1990s and is now also shown on cable television as originally filmed.
Though only his voice is heard in this film, this was George Burns' first movie work in over 15 years since Honolulu (1939); he would not have a movie role again for nearly 20 years (The Sunshine Boys (1975)).
Judy Holliday and Paul Douglas starred together on Broadway in "Born Yesterday". Holliday was cast in the film, but Douglas' role was played in Born Yesterday (1950) by Broderick Crawford.
Snell tells Blessington that Laura cost the firm $300 in postage in a week. The cost of mailing a first-class letter at the time was three cents, so that would mean she had sent out 10,000 letters in that week.
When McKeever is telling Laura that the Directors sent her to Washington to pressure him into giving them government contracts, he says there happens to be a federal law against that, referring to being an unregistered lobbyist. Laura, however, replies, "I know; the Mann Act." This is a federal law that criminalizes the transportation of "any woman or girl for the purpose of prostitution or debauchery, or for any other immoral purpose."