Teresa Carreño (1853–1917) first performed Edvard Grieg’s (1843–1907) Pictures from Folk Life, op. 19 [Folkelivsbilleder] and Piano Concerto in A Minor, op. 16, during her tours in the United States in the early 1880s. She continued to perform his works in the United States and abroad through 1914. Previously overlooked correspondence, reviews, and other primary sources, such as concert programs, housed in the Edvard Grieg Collection in the Bergen Offentlige Bibliothek, and the Teresa Carreño Collection in Archives and Special Collections of the Vassar College Libraries, are examined in this article in order to provide fresh insight and historical context of Carreño’s performance reception, as well as both her personal and professional relationship with Edvard Grieg. In addition to the correspondence between Carreño and Grieg, letters to the Viennese agent Albert J. Gutmann are also examined, and demonstrate Grieg’s preference for Carreño as soloist—despite his access to other great pianists—as well as their friendship and collegiality, choices in repertoire selection, concert preparations, and other important events in their lives.