Question: Donald Spoto, is an American biographer and theologian, and is best known for his best-selling biographies of film and theatre celebrities such as which Swedish actress who starred in a variety of European and American films, and is best remembered for her roles as Ilsa Lund in "Casablanca" (1942)?
Context: Ingrid Bergman (] ; 29 August 191529 August 1982) was a Swedish actress who starred in a variety of European and American films.  She won three Academy Awards, two Emmy Awards, four Golden Globe Awards, a BAFTA Award, and the Tony Award for Best Actress.  She is best remembered for her roles as Ilsa Lund in "Casablanca" (1942) and as Alicia Huberman in "Notorious" (1946), an Alfred Hitchcock thriller starring Cary Grant and Claude Rains. Ewa Brigitta Aulin (born 13 February 1950 in Landskrona, Skåne County) is a former Swedish actress who appeared in a number of Italian and some American films in the 1960s and 1970s.  She is remembered for playing the title character in the cult film "Candy" where she appeared alongside such stars as John Huston, Ringo Starr, Walter Matthau, James Coburn, Richard Burton and Marlon Brando.  She is known to horror film fans for 3 genre films she starred in..."Death Smiles at a Murderer", "Death Laid an Egg" and "Ceremonia Sangrienta" (aka "Legend of Blood Castle"). Rebecca Louisa Ferguson Sundström (born 19 October 1983), known professionally as Rebecca Ferguson, is a Swedish actress.  She is best known for her lead role as Elizabeth Woodville in "The White Queen" (2013), which earned her a Golden Globe nomination, and her starring roles as Ilsa Faust in "" (2015) and as Dr. Miranda North in "Life" (2017).  Ferguson is set to return as Ilsa Faust in "" (2018). Jean Strouse (born 1945) is an American biographer, cultural administrator, and critic.  She is best known for her biographies of diarist Alice James and financier J. Pierpont Morgan. Arthur "Dooley" Wilson (April 3, 1886 – May 30, 1953) was an American actor and singer, who is best remembered as the piano-player and singer Sam who sings "As Time Goes By" at the request of Ilsa Lund (Ingrid Bergman) in "Casablanca" (1942). Donald Spoto (born June 28, 1941) is an American biographer and theologian.  He is best known for his best-selling biographies of film and theatre celebrities such as Alfred Hitchcock, Laurence Olivier, Tennessee Williams, Ingrid Bergman, James Dean, Elizabeth Taylor, Grace Kelly, Marlene Dietrich, Marilyn Monroe, Audrey Hepburn, and Alan Bates.  He has also written biographical accounts of the House of Windsor from the Victorian Era through to Diana, Princess of Wales and of religious figures such as Jesus, and Saint Francis of Assisi, which was made into a television program by Faith & Values Media. The Girl is a 2012 British television film directed by Julian Jarrold, written by Gwyneth Hughes and produced by the BBC and HBO Films.  The film stars Sienna Miller as Tippi Hedren and Toby Jones as Alfred Hitchcock.  It is based on Donald Spoto's 2009 book, "Spellbound by Beauty: Alfred Hitchcock and His Leading Ladies", which discusses British-born film director Hitchcock and the women who played leading roles in his films.  "The Girl"' s title was inspired by Hitchcock's alleged nickname for Hedren. Hans Walter Conrad Veidt (22 January 1893 – 3 April 1943) was a German actor best remembered for his roles in films such as "The Cabinet of Dr. Caligari" (1920), "The Man Who Laughs" (1928), and, after being forced to migrate to Britain by the rise of Nazism in Germany, his English-speaking roles in "The Thief of Bagdad" (1940), and, in Hollywood, "Casablanca" (1942), in which he appeared as Major Strasser.  After a successful career in German silent film, where he was one of the best-paid stars of Ufa, he left Germany in 1933 with his new Jewish wife after the Nazis came to power.  They settled in Britain, where he participated in a number of films before emigrating to the United States around 1941. Diane Helen Wood Middlebrook (April 16, 1939 – December 15, 2007) was an American biographer, poet, and teacher.  She taught feminist studies for many years at Stanford University.  She is best known for critically acclaimed biographies of poets Anne Sexton and Sylvia Plath (along with Plath's husband Ted Hughes), and jazz musician Billy Tipton.  Middlebrook was preparing a biography of the Roman poet Ovid, to be published in 2008.  Her death brought that project to a close. Anders Theodor Samuel Nygren (15 November 1890, Gothenburg – 20 October 1978, Lund) was a Swedish Lutheran theologian.  He was professor of systematic theology at Lund University from 1924 and was elected Bishop of Lund in 1948 (emeritus 1958).  He is best known for his two-volume work "Eros and Agape" (first published in Swedish 1930–1936).
Answer: Ingrid Bergman