Known for Giannina Mia and Love Is Like a Firefly. He gained success with Rose-Marie and The Vagabond King both on Broadway and film.
He was an accompanist to a violinist. He studied with Antonin Dvorak at the Prague Conservatory.
He was inducted into the Songwriters Hall of Fame in 1971.
He married Kay Wong Ling Friml.
He collaborated with lyricist Otto Harbach.