Gertrude Lawrence cameras and lighting could not function properly inside a Broadway theater. In 1943, Lawrence hosted a weekly series of American radio shows, some of them featuring discussions with guests and others adaptations of Hollywood hit films. In 1947, she returned to NBC for a production of the 1913 Shaw play "The Great Catherine". To promote "The King and I", Lawrence appeared on various television programs, including the Ed Sullivan-hosted "Toast of the Town", with Rodgers and Hammerstein joining her to perform selections from the show. Additionally, she appeared on several BBC Radio interview and variety shows before and after World
The King and I a musical could be made until they saw the 1946 film adaptation, starring Irene Dunne and Rex Harrison, and how the screenplay united the episodes in the novel. Rodgers and Hammerstein were also concerned about writing a star vehicle. They had preferred to make stars rather than hire them, and engaging the legendary Gertrude Lawrence would be expensive. Lawrence's voice was also a worry: her limited vocal range was diminishing with the years, while her tendency to sing flat was increasing. Lawrence's temperament was another concern: though she could not sing like one, the star was known to be capable