Question: Ziegfeld Follies is a 1946 American musical comedy film starring an american film actress who was also a what?

full_context: Document 1: Cyd Charisse: Cyd Charisse (born Tula Ellice Finklea; March 8, 1922 – June 17, 2008) was an American dancer and actress.
Document 2: Glorifying the American Girl: Glorifying the American Girl is a 1929 American Pre-Code, musical comedy film produced by Florenz Ziegfeld that highlights Ziegfeld Follies performers. The last third of the film (which was filmed in early Technicolor) is basically a Follies production, with cameo appearances by Rudy Vallee, Helen Morgan, and Eddie Cantor.
Document 3: Funny Face: Funny Face is a 1957 American musical romantic comedy film directed by Stanley Donen and written by Leonard Gershe, containing assorted songs by George and Ira Gershwin. Although having the same title as the 1927 Broadway musical "Funny Face" by the Gershwin brothers, and featuring the same male star (Fred Astaire), the plot is totally different and only four of the songs from the stage musical are included. Alongside Astaire, the film stars Audrey Hepburn and Kay Thompson.
Document 4: The Band Wagon: The Band Wagon is a 1953 musical comedy film directed by Vincente Minnelli, starring Fred Astaire and Cyd Charisse.  Fred Astaire was contemplating retirement just like his character. It tells the story of an aging musical star who hopes a Broadway show will restart his career. However, the play's director wants to make it a pretentious retelling of "Faust", and brings in a prima ballerina who clashes with the star. Along with "Singin' in the Rain", it is regarded as one of the finest of the Metro-Goldwyn-Mayer musicals, although it was only a modest box-office success on first release.
Document 5: Louise Brooks: Mary Louise Brooks (November 14, 1906 – August 8, 1985), who worked professionally as Louise Brooks, was an American film actress and dancer noted as an iconic symbol of the flapper, and for popularizing the bobbed haircut.
Document 6: Vera-Ellen: Vera-Ellen (born Vera-Ellen Westmeier Rohe; February 16, 1921 – August 30, 1981) was an American dancer and actress, principally
Document 7: Audrey Hepburn: Audrey Hepburn ( ; born Audrey Kathleen Ruston; May 4, 1929January 20, 1993) was a British actress, model, dancer and humanitarian. Recognized as a film and fashion icon, Hepburn was active during Hollywood's Golden Age. She was ranked by the American Film Institute as the third-greatest female screen legend in Golden Age Hollywood and was inducted into the International Best Dressed List Hall of Fame.
Document 8: Blue Skies (1946 film): Blue Skies is a 1946 American musical comedy film directed by Stuart Heisler and starring Bing Crosby, Fred Astaire, and Joan Caulfield. Based on a story by Irving Berlin, the film is about a dancer who loves a showgirl who loves a compulsive nightclub-opener who can't stay committed to anything in life for very long. Produced by Sol C. Siegel, "Blue Skies" was filmed in Technicolor and released by Paramount Pictures. The music, lyrics, and story were written by Irving Berlin, with most of the songs recycled from earlier works.
Document 9: Lucille Bremer: Lucille Bremer (February 21, 1917 – April 16, 1996) was an American film actress and dancer.
Document 10: Lucille Ball: Lucille Désirée Ball (August 6, 1911 – April 26, 1989) was an American actress, comedienne, model, film-studio executive, and producer. She was best known as the star of the self-produced sitcoms "I Love Lucy", "The Lucy–Desi Comedy Hour", "The Lucy Show", "Here's Lucy", and "Life with Lucy".
Document 11: Betty Grable filmography: This is a complete filmography of Betty Grable, an American actress, dancer, and singer. As a major contract star for 20th Century-Fox during the 1940s and 1950s, she starred in a succession of musicals and romantic comedies.
Document 12: Ziegfeld Follies (film): Ziegfeld Follies is a 1946 American musical comedy film released by Metro-Goldwyn-Mayer and directed by Lemuel Ayers, Roy Del Ruth, Robert Lewis, Vincente Minnelli, Merrill Pye, George Sidney and Charles Walters. It stars many of MGM leading talents, including Fred Astaire, Lucille Ball, Lucille Bremer, Fanny Brice (the only member of the ensemble who was a star of the original Follies), Judy Garland, Kathryn Grayson, Lena Horne, Gene Kelly, James Melton, Victor Moore, William Powell, Red Skelton, and Esther Williams.
Document 13: The Belle of New York (1952 film): The Belle of New York is a 1952 Metro-Goldwyn-Mayer Hollywood musical comedy film set in New York circa 1900 and stars Fred Astaire, Vera-Ellen, Alice Pearce, Marjorie Main, Gale Robbins and Keenan Wynn, with music by Harry Warren and lyrics by Johnny Mercer. The film was directed by Charles Walters.
Document 14: Joan Crawford: Joan Crawford (born Lucille Fay LeSueur; (March 23, 190? – May 10, 1977) was an American film and television actress who began her career as a dancer and stage showgirl. In 1999, the American Film Institute ranked Crawford tenth on its list of the greatest female stars of Classic Hollywood Cinema.
Document 15: This Heart of Mine: "This Heart of Mine" is a 1946 song. This music standard was written by composer Harry Warren and lyricist Arthur Freed to be featured in the musical film score "Ziegfeld Follies". This song is introduced by Fred Astaire who danced with Lucille Bremer in a lavish and romantic dance. In the same film, Esther Williams swam in a water ballet to a softer, instrumental version of the song. Judy Garland and Maxine Sullivan have also recorded this song.
ground_truth: dancer