She entered films in Britain, but after her marriage to Jack Hawkins failed, she moved to the United States hoping to find better roles. During her time as a leading actress on the stage in London she often had to fight for roles over her two rivals, Peggy Ashcroft and Celia Johnson. In 1942, she married Hume Cronyn and over the following years played supporting roles in several Hollywood films. Tandy became a naturalized citizen of the United States in 1952.