Claudette Colbert spent much of her film career controlling what the camera saw. Born Émilie Claudette Chauchoin in France in 1903 and raised in New York, she came from the stage into talking pictures and became one of Hollywood’s most disciplined stars. She was famously particular about lighting and camera angle, especially her preferred left profile. Radio removed all of that control at once.

What remained was the part of Colbert’s craft that had never depended on a face: a velvety voice, exact comic timing and the ability to sound intelligent without making intelligence feel heavy. That combination explains why Lux Radio Theatre used her so often. Between the mid-1930s and the 1950s she repeatedly returned to the program, rebuilding film stories for listeners who could no longer see the costumes, expressions or physical comedy.

Sometimes the broadcasts let Colbert revisit her own screen material, including It Happened One Night, Midnight, So Proudly We Hail!, The Egg and I and other films associated with her career. At other times radio cast her in roles she had not originated. The distinction is important. A star adaptation was not merely a shortened soundtrack. Colbert had to determine which parts of a film performance lived in dialogue and which visual information needed to be recreated through pace, emphasis or reaction.

Her comedy was particularly suited to that process. Colbert had what Billy Wilder later described as a strong instinct for where the joke was. On radio, that instinct became audible without distraction. A delayed answer, a slight shift in tone or the choice to underplay a line could replace the raised eyebrow a movie audience would have seen.

Colbert continued acting on stage long after her Hollywood peak and returned to Broadway in later life, eventually receiving a Tony nomination for The Marriage-Go-Round. Her career therefore began and ended close to live performance, with radio sitting between stage and film as another place where technical control had to serve apparent ease.