 In 1912, he relocated with his family to Belgium and in 1918, they fled the fighting of World War I and temporarily moved to St. Moritz and Uttwil in Switzerland.Sternheim and Thea divorced in 1927.His next marriage, to actress and singer Pamela Wedekind, took place in 1930 and lasted until 1934, after which he lived with Henriette Carbonara.