Wynyard Browne's original play opened at London's Duchess Theatre in 1950. Maureen Delaney and Margaret Halstan reprised their stage roles for this movie.
Despite playing her father in this film, Ralph Richardson was only six years older than Celia Johnson.
The book mentioned about South America is The History of the Conquest of Peru by William H. Prescott.
The early scene shows a glimpse of the Albert Memorial, setting the location of the hotel near the Royal Albert Hall in London, SW7.