Question: They Shall Have Music was a musical that starred which supporting actress who was popular in such roles in the 1930s?

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Octavia Spencer: Octavia Lenora Spencer (born May 25, 1972) is an American actress and author.  She made her film debut in the 1996 drama film "A Time to Kill".  Her breakthrough came in 2011, when she starred as Minny Jackson in the period drama film "The Help", for which she won the Academy Award, Golden Globe, SAG, BAFTA, and Critics' Choice Movie Award for Best Supporting Actress.  She had a critically acclaimed performance in Ryan Coogler's drama "Fruitvale Station" (2013), for which she received the National Board of Review Award for Best Supporting Actress.  Spencer has received acclaim for her work in the films "Smashed" (2012), "Snowpiercer" (2013), "Get on Up" (2014), "The Divergent Series" (2015-2016), "Zootopia" (2016) and "The Shape of Water" (2017).  In 2017, she received Academy Award, Golden Globe, and SAG nominations for Best Supporting Actress for her performance as mathematician Dorothy Vaughan in the drama "Hidden Figures".

Helene Millard: Helene Millard (September 30, 1905 – September 20, 1974) was an American supporting actress of the 1930s and 1940s.  She started her film career in a featured role in 1929's "The Thirteenth Chair".  During the 1930s, she appeared in 18 films, mostly in supporting or featured roles, but her roles diminished near the end of the decade.  She made six films at the beginning of the 1940s, all in supporting roles, after which she left the film industry in 1942.  She returned to films briefly in 1952-53, when she made four more films, before leaving the film industry for good.  Her final film appearance was in a small role in "Remains to Be Seen" (1953), starring June Allyson and Van Johnson.  During the early 1950s, she appeared in several television shows, as well, before retiring for good in 1954 after an appearance on "Topper".  She died on September 20, 1974, in Laguna Hills, California.

Julie Benz: Julie Marie Benz (born May 1, 1972) is an American actress, best known for her roles as Darla on "Buffy the Vampire Slayer" and "Angel" (1997–2004) and Rita Bennett on "Dexter" (2006–2010), for which she won the 2006 Satellite Award for Best Supporting Actress and the 2009 Saturn Award for Best Supporting Actress.  She has also starred on the series "Roswell" (1999–2000), "Desperate Housewives" (2010), "No Ordinary Family" (2010–2011), "A Gifted Man" (2011–2012), "Defiance" (2013–2015), and "Hawaii Five-0" (2015–present).  Her film roles include "Jawbreaker" (1999), "The Brothers" (2001), "Rambo", "Saw V" and "" (2008), "" (2009), and "Bedrooms" (2010).

Maisie Williams: Margaret Constance "Maisie" Williams (born 15 April 1997) is an English actress.  She made her professional acting debut as Arya Stark in the HBO fantasy television series "Game of Thrones" in 2011, for which she won the EWwy Award for Best Supporting Actress in a Drama, the Portal Award for Best Supporting Actress – Television and Best Young Actor, and the Saturn Award for Best Performance by a Younger Actor.  In 2016, she was nominated for a Primetime Emmy Award for Outstanding Supporting Actress in a Drama Series.

Juliette Barnes: Juliette Jolene Barnes-Barkley is a fictional character and one of the two leads in the ABC/CMT musical drama series "Nashville".  Juliette is portrayed by actress Hayden Panettiere since the pilot episode, which aired on October 10, 2012.  Juliette was a teenage country sensation and is now making more mature music.  She tries to take the throne, as Queen of Country music, from rival Rayna Jaymes.  Panettiere has received critical acclaim for her performance as Juliette and she has been nominated for a Golden Globe Award for Best Supporting Actress – Television Series Drama in 2013 and 2014, a Satellite Award for Best Actress – Television Series Drama in 2012 and a Critics' Choice Television Award for Best Supporting Actress in a Drama Series in 2016.

Andrea Leeds: Andrea Leeds (August 18, 1914 – May 21, 1984) was an American film actress.  A popular supporting player of the late 1930s, Leeds was nominated for an Academy Award for Best Supporting Actress for her performance in "Stage Door" (1937).  She was progressing to leading roles, when she retired from acting following her marriage in 1939, and was later a successful horse breeder.

Frances Conroy: Frances Hardman Conroy (born November 13, 1953) is an American actress.  She is best known for playing Ruth Fisher on the television series "Six Feet Under".  Her work on the show won her acclaim and several awards, including a Golden Globe and three Screen Actors Guild Awards.  She is also known for playing the older version of the character Moira O'Hara on of the television anthology series "American Horror Story", which garnered Conroy her first Saturn Award for Best Supporting Actress on Television nomination, and as well an Emmy nomination for Outstanding Supporting Actress in a Miniseries or a Movie.  Conroy subsequently portrayed The Angel of Death, Myrtle Snow, Gloria Mott, and Mama Polk on four further seasons of the show "", "", "", and "", respectively.  For her performance in "Coven", she was nominated again for a Primetime Emmy Award for Outstanding Supporting Actress in a Miniseries or a Movie.

Joan Hackett: Joan Ann Hackett (March 1, 1934 – October 8, 1983) was an American actress of film, stage and television.  She was nominated for the BAFTA Award for Best Foreign Actress for the 1966 film "The Group", and starred in the 1967 western "Will Penny".  She went on to be nominated for the Academy Award for Best Supporting Actress and win the Golden Globe Award for Best Supporting Actress for the 1981 film "Only When I Laugh".  She also starred as Christine Mannon in the 1978 PBS miniseries version of "Mourning Becomes Electra".

National Film Award for Best Supporting Actress: The National Film Award for Best Supporting Actress (also known as the Rajat Kamal Award for the Best Supporting Actress) (] ), is an honour presented annually at the National Film Awards of India since 1984 to an actress for the best performance in a supporting role within Indian cinema.  The National Film Awards were established in 1954 and are presented by the Directorate of Film Festivals, the organization set up by Ministry of Information and Broadcasting, India.  The National Film Awards instituted the "Best Supporting Actress" category in 1984 as the "Rajat Kamal Award for the Best Supporting Actress".

They Shall Have Music: They Shall Have Music is a 1939 musical film starring famed violinist Jascha Heifetz (as himself), Joel McCrea, Andrea Leeds, and Gene Reynolds.  A young runaway finds his purpose in life after hearing Heifetz play, and the kindly master of a music school in financial difficulty takes him in.

Supporting paragraphs: They Shall Have Music Andrea Leeds
Answer: Andrea Leeds