The swimming pool at the Grand Hotel on Mackinac Island, MI, is named the Esther Williams Swimming Pool due to the hotel pool being used in the film.
Esther Williams was pregnant during filming. Unfortunately, a few months later she suffered a miscarriage.
In the long shots of the scene where Deborah drives the sleigh, it's really being driven by a local boy of the same age.
The film's television premiere took place in Los Angeles Friday 24 May 1957 on KTTV (Channel 11); it was first telecast in Hartford CT 29 June 1957 on WHCT (Channel 18), in Miami 21 July 1957 on WCKT (Channel 7), in Phoenix 19 October 1957 on KPHO (Channel 5), in New Haven CT 21 October 1957 on WNHC (Channel 8), in Altoona PA 4 November 1957 on WFBG (Channel 10), in Binghamton NY 20 November 1957 on WNBF (Channel 12), in Cincinnati 30 November 1957 on WLW-T (Channel 5), in Lebanon PA 2 December 1957 on WLBR (Channel 15), in Nashville 12 December 1957 on WLAC (Channel 5), and, eventually, in Philadelphia 13 August 1958 on WFIL (Channel 6), in Chicago 14 February 1959 on WBBM (Channel 2), in New York City 11 December 1959 on WCBS (Channel 2) and in San Francisco 16 April 1960 on KGO (Channel 7). At this time, color broadcasting was in its infancy, limited to only a small number of high rated programs, primarily on NBC and NBC affiliated stations, so these film showings were all still in B&W. Viewers were not offered the opportunity to see these films in their original Technicolor until several years later.