Marcia Mornay

Internationally famed opera diva in the 1937 movie Maytime. Played by Jeanette MacDonald, she has an opera composed especially for her by Trentini

Mornay has a tragic love affair with fellow opera singer Paul Allison (Nelson Eddy).

The film Maytime is based on a 1917 musical/operetta of the same name by Sigmund Romberg and Rida Johnson Young, but in that version, as well as the 1923 silent film version, nobody is a composer, or singer, or famous.