Brenda Vaccaro was nominated for the 1966 Tony Award (New York City) for Supporting or Features Actress in a Drama for "Cactus Flower" as Toni.
Lauren Bacall played the part of Stephanie Dickinson on the Broadway stage.
Tuesday Weld turned down the role of Toni Simmons.
Burt Brinckerhoff was nominated for the 1966 Tony Award (New York City) for Supporting or Features Actor in a Drama for "Cactus Flower" in the role of Igor.
In the record store, a customer approaches Toni and asks her a question. The album he is holding happens to be the original cast recording of the musical "Mame" starring Angela Lansbury. This is an homage to the film's director Gene Saks, since he also directed "Mame" when it opened on Broadway in 1966.
Making this movie was the first time Ingrid Bergman had been on a Hollywood sound stage since the 1940s - all her subsequent films up to that point had been made in Europe, even those for American studios.
The original Broadway production of "Cactus Flower" by Abe Burrows opened at the Royale Theater on December 8, 1965 and ran for 1234 performances starring Lauren Bacall and Barry Nelson.
The three kids seen behind the GTO in the GM 5th Avenue showroom during Walter Matthau and Goldie Hawn's NY walkabout are David and Jenny Matthau and I.A.L. Diamond's son Paul.