The Sound of Music (film) of the film; the actor accepted after being assured that he could work with Lehman to improve the character; Plummer later described himself as having become quite arrogant at the time, "spoiled by too many great theater roles". Wise also spent considerable time and effort on casting the secondary characters. For the role of Max Detweiler, Wise initially considered Victor Borge, Noël Coward, and Hal Holbrook among others before deciding on Richard Haydn. For the character of Baroness Elsa Schraeder, Wise looked for a "name" actress—Andrews and Plummer were not yet widely known to film audiences—and decided on Eleanor Parker.
The Sound of Music (film) adjacent to Schloss Leopoldskron called Bertelsmann, and the interior was a constructed set at Fox studios. The gazebo scenes for "Something Good" and "Sixteen Going on Seventeen" were filmed on a larger reconstructed set at Fox studios, while some shots of the original gazebo were filmed on the grounds at Schloss Leopoldskron in Salzburg. Robert Wise hired Mike Kaplan to direct the publicity campaign for the film. After reading the script, Kaplan decided on the ad line "The Happiest Sound in All the World", which would appear on promotional material and artwork. Kaplan also brought in outside agencies to work