Question: Which Austrian and American film actress and inventor starred in the 1958 American CinemaScope film The Female Animal alongside Jane Powell, Jan Sterling, and George Nader?

Context paragraphs:
The High and the Mighty (film): The High and the Mighty is a 1954 "WarnerColor" American "disaster" film in CinemaScope directed by William A. Wellman and written by Ernest K. Gann who also wrote the 1953 novel on which his screenplay was based.  The film's cast was headlined by John Wayne, who was also the project's co-producer.  Composer Dimitri Tiomkin won an Academy Award for his original score while his title song for the film also was nominated for an Oscar (although the title song did not actually appear in release prints nor in the recent restoration of the film).  The film received mostly positive reviews and grossed $8.5 million in its theatrical release.  The supporting cast includes Claire Trevor, Laraine Day, Robert Stack, Jan Sterling, Phil Harris and Robert Newton.

Queen of Outer Space: Queen of Outer Space is a 1958 American CinemaScope science fiction feature film directed by Edward Bernds, and starring Zsa Zsa Gabor, Eric Fleming and Laurie Mitchell in a tale about a revolt against a cruel Venusian queen.  The screenplay by Charles Beaumont was based on an idea supplied by Ben Hecht, originally to be titled "Queen of the Universe".  The film was released theatrically in some areas on a double bill with the Boris Karloff film "Frankenstein 1970" (1958).

Flood Tide (film): Flood Tide is a 1958 American CinemaScope drama romance film directed by Abner Biberman starring George Nader, Cornell Borchers and Michel Ray.

Michael Nader: Michael Nader (born February 19, 1945, St. Louis, Missouri) is an American actor, known for his role on the ABC primetime soap opera "Dynasty" from 1983 to 1989 as Farnsworth "Dex" Dexter, the third husband of Alexis Colby (played by Joan Collins).  He is the nephew of the late film and TV actor George Nader.

Appointment with a Shadow: Appointment with a Shadow is a 1958 CinemaScope film noir crime film directed by Richard Carlson starring George Nader, Joanna Moore, Brian Keith and Virginia Field.

The Female Animal: The Female Animal is a 1958 American CinemaScope film noir drama film directed by Harry Keller and starring Hedy Lamarr, Jane Powell, Jan Sterling and George Nader.

Hedy Lamarr: Hedy Lamarr ( ; born Hedwig Eva Maria Kiesler, November 9, 1914 January 19, 2000) was an Austrian and American film actress and inventor.

George Nader: George Nader (October 19, 1921 – February 4, 2002) was an American film and television actor.  He appeared in a variety of films from 1950 through 1974, including "Phone Call from a Stranger" (1952), "Congo Crossing" (1956), and "The Female Animal" (1958).  During this period, he also did episodic television and starred in several series, including NBC's "The Man and the Challenge" (1959–60).  He is remembered for his starring role in "one of the worst films ever made", low-budget 3-D sci-fi film "Robot Monster" (1953).  Discreetly gay during his film career, he and his life partner were among Rock Hudson's closest friends.  He later wrote "Chrome" (1978), a science-fiction novel dealing openly and positively with a same-sex relationship.

The Bravados: The Bravados is a 1958 American western film (color by DeLuxe) directed by Henry King, starring Gregory Peck and Joan Collins.  The CinemaScope film was based on a novel of the same name written by Frank O'Rourke.

Song of the Open Road: Song of the Open Road is a 1944 musical comedy film directed by S. Sylvan Simon, from a screenplay by Irving Phillips and Edward Verdier.  It was the debut film of teenage singer Jane Powell.  Powell's real name was Suzanne Burce, but prior to the release of this film MGM assigned her the stage name "Jane Powell" (the name of the character she portrays in this film).

Supporting paragraphs: The Female Animal Hedy Lamarr
Answer: Hedy Lamarr