In 1907, he lived one year in Paris. He said about this time 'I did not discover Beardsley until when I had already been in Paris for a year'. In 1910–12, Romain moved to Paris to pursue a career as a designer. He made this decision despite strong objections from his father, who wanted Romain to continue the family tradition and become a naval officer. Romain assumed his pseudonym to avoid disgracing the family. He worked for Paul Poiretfrom 1913-1914. In 1915, he secured his first substantial contract with Harper's Bazaar magazine, and thus launched an illustrious career that included designing costumes and stage sets. Between 1915–1937, Erte designed over 200 covers for Harper's Bazaar, and his illustrations would also appear in such publications as Illustrated London News, Cosmopolitan, Ladies' Home Journal, and Vogue.
Erté is perhaps most famous for his elegant fashion designs which capture the art deco period in which he worked. One of his earliest successes was designing apparel for the French dancer