Her sister Pansy Wilcox married film studio executive Nicholas Schenck.

[4] In 1930, she produced The 9:15 Revue,[5] with formidable writing and performing rosters including Anita Loos, Ring Lardner, Ira Gershwin, George Gershwin, Harold Arlen,[6] Eddie Cantor, Ruth Etting, and Leslie Howard.

[7] Bachelor Born, which she produced in 1938 with Milton Shubert, ran for over a year with 400 performances, and toured nationally.

[8] Selwyn was also active in developing Palm Springs, where she owned the Red Roof Ranch.

[14] Ruth Selwyn died in Hollywood on December 13, 1954, and was interred at Forest Lawn Memorial Park, Glendale, California; she was 49 years old.