Joseph Mansfield Santley was an American actor, singer, dancer, writer, director, and producer of musical theatrical plays motion pictures and television shows. He adopted the stage name of his stepfather, actor Eugene Santley.

Silvio Hein was an American composer, songwriter, conductor, and theatrical producer. He was a songwriter for Tin Pan Alley and composed the scores to fourteen Broadway musicals. His most successful stage work was the 1917 musical Flo-Flo which he created with the French librettist and playwright Fred de Gresac. His songs were also interpolated into musicals created by others, including The Little Duchess and Ziegfeld Follies. In addition to his work writing music, he also worked as both a conductor and producer on Broadway. In 1914 he was a founding member of the American Society of Composers, Authors and Publishers.