According to contemporary articles in Daily Variety and The Hollywood Reporter, director Mitchell Leisen became ill during production and was replaced by an uncredited Richard Thorpe.
Greg and Tony's hotel rate of 1,100 francs would equal $3.15 at the time or nearly $30 in 2018.
The airplane shown landing in Paris is a 1949 Boeing 377 Stratocruiser, registration N1036V, owned by Pan Am and named "Clipper Washington". This plane also appeared in Ein Stück vom Himmel (1957). This aircraft served with Pan Am until 1961.
This film performed poorly at the box office resulting in a loss of $518,000 ($4.7M in 2016) for MGM according to studio records.
Along with Ivanhoe (1952), Knights of the Round Table (1954), Betrayed (1954) and Invitation to the Dance (1956), among others, this is one of several films M-G-M shot in Europe during the 1950s to avail itself of generous tax breaks that benefited both the studio and cast members.