Aside from "Holiday for Lovers" in 1959, this is one of the few films that demonstrates Clifton Webb's accomplished dancing skills, as he was earlier in his career a successful Broadway performer.
Clifton Webb received his third and final Oscar nomination for this film. It was his only nomination for lead actor (his two previous nominations were for supporting actor).
Pilots for a "Mr. Belvedere" television series were shot in 1959 with Hans Conried in the title role, and in 1965 with Victor Buono. The series finally made it to air on the ABC network as Mr. Belvedere (1985).
Included among the American Film Institute's 2000 list of the 500 movies nominated for the Top 100 Funniest American Movies.