Aileen St. John-Brenon (1894–1967) was an American music critic, and theatrical and film publicist. She was born in England on 17 April 1894 and emigrated the following year with her parents, music critic Algernon St. John-Brenon (1875–1915), and Grace (Damian) St. John-Brenon (1869–1946), an oratorio singer who appeared at command performances before Queen Alexandra at Buckingham Palace. Aileen succeeded her father as music critic for the New York Morning Telegraph. Following that she directed publicity for the 1927 opening of the Roxy Theatre, Samuel "Roxy" Rothafel's 6,000-seat "cathedral of the motion picture" at 153 West 50th Street in Manhattan. (The Roxy was demolished in 1961.) Aileen moved on to film publicity, writing for Pathé Exchange (just before Joseph P. Kennedy sold it to R.K.O. in April 1930), Paramount, Cecil B. DeMille, and David O. Selznick. In the early 1950s, in partnership with Helen Morgan, she represented the performers Sophie Tucker and Judy Garland, and the film and theater director Rouben Mamoulian. Aileen retired in 1955 to travel with her second husband, playwright Richard Harrity (1907–1973), who was then travel editor for Cosmopolitan. Her first husband, whom she married in 1923 and divorced in 1947, was the novelist and art critic Thomas Jewell Craven (1888–1969), who championed the work of Thomas Hart Benton and Grant Wood. By her first husband Aileen had one son, Richard Craven (1928–2001). By her second husband she was stepmother to actor Rory Harrity (1933–1974). Aileen St. John-Brenon died in New York City on 23 September 1967, aged seventy-two.

In addition to her parents and both husbands, virtually every member of Aileen's extended family had some connection to the arts. Her grandmother, Frances (Harris) St. John-Brenon (1848–1931), was a traveler and author of the newspaper column "Things Quaint and Curious." (Oscar Wilde frequented her London salon.) Aileen's grandfather was the English dramatic critic Edward St. John-Brenon. Her uncle, Herbert Brenon (1880–1958), was a motion picture director perhaps best known for the silent films "Peter Pan" (1924) and "Beau Geste" (1926). Aileen's younger sister, Juliet St. John-Brenon (1895–1979), was an actress who appeared in some of their Uncle Herbert's films. Juliet married well-known set designer Cleon "Throck" Throckmorton (1897-1965), who maintained an active studio in bohemian Greenwich Village. An aunt, Roma (Brenon) Gurney (c. 1870–1927), was an actress, whose children, Oliver "Noll" Gurney and Hillary Gurney worked for the Cecil B. DeMille Film Company as production manager and secretary to the publicity manager.

[This note is drawn from several obituaries in the New York Times: "Algernon St. John-Brenon. Musical Critic of The Morning Telegraph Dies at Atlantic City" (20 December 1915); "Mrs. Frances Brenon Dies on Coast at 82" (14 July 1931); "Mrs. A. St. J. Brenon; Was Oratorio Singer" (2 October 1946); "Cleon Throckmorton, 68, Dead; Designed O'Neill Stage Settings" (25 October 1965); "Aileen Harrity, 72, A Publicity Woman" (24 September 1967); "Thomas Craven, Author, Dead; Caustic Art Critic and Lecturer" (1 March 1969); "Richard Harrity, Playwright, Dies" (21 January 1973); "Juliet B. Throckmorton" (22 November 1979).]