Collaborated with Alan Jay Lerner on "Camelot" and "My Fair Lady," both long-running Broadway musicals and classic films. He was inducted into the Songwriters Hall of Fame in 1972.
He became the youngest piano soloist in the history of the Berlin Philharmonic at age 13. He met Lerner at the famous Lambs Club.
He and Lerner had their first hit with "Brigadoon" from 1947. Their film musical "Gigi" from 1958 garnered nine Academy Awards.
His father was a Jewish operetta star who had played Count Danilo in the Berlin production of "The Merry Widow" in 1906. He married Ernestine Zwerline in 1931 and divorced her in 1957.
He and Lerner based their Tony Award-winning "My Fair Lady" on "Pygmalion" by George Bernard Shaw.