Ronald Augustus Mack (July 11, 1940 – November 5, 1963) was an American songwriter, singer and talent manager who wrote “He’s So Fine“, a number one chart hit in 1963 for the Chiffons and the apparent inspiration for George Harrison‘s “My Sweet Lord“. Mack’s early death reportedly inspired Holland, Dozier and Holland to write the song “Jimmy Mack“.

Ronnie Mack (known to his friends as Rocco) grew up in Harlem, New York City, and loved music from childhood, teaching himself to play piano. By the mid-1950s he started writing songs, and also performed in a doo-wop vocal group, the Marquis, which unusually for the time featured a female lead singer, June Bateman (who later married musician Noble “Thin Man” Watts). In 1956, the group recorded a song co-written by Mack, “Bohemian Daddy”, for the Onyx record label. After the Marquis split up, Mack formed a new group, the Highlights, who included singer Joyce Peterson, but they never recorded.