The Good Earth
As an actress of Chinese descent, Loo's acting career started in 1930s. Loo mostly played small parts. Loo appeared in "The Good Earth" (1937), and was a maid in "Mr. Wong in Chinatown" (1939); her husband Richard Loo was also in the cast of both films. She began working with Central Casting during the making of "The Good Earth", when her language skills proved useful with the many Chinese-speaking extras.