Francis Rea MacMillen (14 October 1885, in Marietta, Ohio – 14 July 1973, in Lausanne) was an American violinist. At the age of seven, he began studying at the Chicago Musical College, where his teacher was . From 1895 to 1899, he studied with (a student of Joseph Joachim) and with Karl Halir in Berlin and from 1900 to 1902 with César Thomson at the Royal Conservatory of Brussels, where he received two prizes. In the fall of 1902, he made his debut in a Vauxhall in Brussels, followed by a concert tour through Belgium, Germany and England. In the fall of 1903, he played in London and undertook another concert tour through England. His American debut took place on December 7, 1906 at Carnegie Hall with the New York Symphony Society under the direction of Walter Damrosch. This was followed b