Tarzan and the Amazons (1945) is an adventure film starring Johnny Weissmuller in his ninth outing as Tarzan.
 Brenda Joyce plays Jane, in the first of her five appearances in the role, and Johnny Sheffield makes his sixth appearance as Boy.
 Henry Stephenson and Maria Ouspenskaya co-star.
Roy Allen Saari (February 26, 1945 – December 30, 2008) was an American competition swimmer, Olympic champion, and former world record-holder in two events.
Anthony Lee Ervin (born May 26, 1981) is an American competition swimmer who has won four Olympic medals and two World Championship golds.
 At the 2000 Summer Olympics, he won a gold medal in the men's 50-meter freestyle, and earned a silver medal as a member of the second-place United States relay team in the 4×100-meter freestyle event.
 He was the second swimmer of African descent after Anthony Nesty of Suriname to win an individual gold medal in Olympic swimming.
 He is the first United States citizen of African descent to medal gold in an individual Olympic swimming event.
Eleanor G. Holm (December 6, 1913 – January 31, 2004) was an American competition swimmer and Olympic gold medalist.
 She is best known for having been expelled from the 1936 Summer Olympics team after she was found severely intoxicated after attending a cocktail party on the transatlantic ship taking the team to Germany.
 She went on to have a high-profile celebrity career as a socialite and interior designer, and co-starred in a Hollywood Tarzan movie --- "Tarzan's Revenge".
 She appeared in that film with Glenn Morris, another Olympian.
Johnny Weissmuller (2 June 190420 January 1984) was an Austro-Hungarian-born American competition swimmer and actor, best known for playing Tarzan in films of the 1930s and 1940s and for having one of the best competitive swimming records of the 20th century.
 Weissmuller was one of the world's fastest swimmers in the 1920s, winning five Olympic gold medals for swimming and one bronze medal for water polo.
 He was the first to break the one minute barrier for 100-meter freestyle, and the first to swim 440-yard freestyle under five minutes.
 He won fifty-two U.S. national championships, set more than 50 world records (spread over both freestyle and backstroke), and was purportedly undefeated in official competition for the entirety of his competitive career.
 After retiring from competitions, he became the sixth actor to portray Edgar Rice Burroughs's ape man, Tarzan, a role he played in 12 motion pictures.
 Dozens of other actors have also played Tarzan, but Weissmuller is by far the best known.
 His character's distinctive Tarzan yell is still often used in films.
Natalie Anne Coughlin Hall (born August 23, 1982) is an American competition swimmer and twelve-time Olympic medalist.
 While attending the University of California, Berkeley, she became the first woman ever to swim the 100-meter backstroke (long course) in less than one minute—ten days before her 20th birthday in 2002.
 At the 2008 Summer Olympics, she became the first U.S. female athlete in modern Olympic history to win six medals in one Olympiad, and the first woman ever to win a 100-meter backstroke gold in two consecutive Olympics.
 At the 2012 Summer Olympics, she earned a bronze medal in the 4×100-meter freestyle relay.
 Her total of twelve Olympic medals ties her with Jenny Thompson and Dara Torres for the most all-time medals by a female swimmer.
Albert L. Schwartz (December 21, 1907 – December 7, 1986) was an American competition swimmer who represented the United States at the 1932 Summer Olympics in Los Angeles, California.
 Schwartz received a bronze medal for his performance in the men's 100-meter freestyle, finishing third in a time of 58.8 seconds in the event final.
 Schwartz was a star swimmer in high school, competing for Marshall High in Chicago, and then starred for Northwestern University.
George Prifold Harrison (April 9, 1939 – October 3, 2011) was an American competition swimmer, Olympic champion, and former world record-holder in three events.
 He competed at the 1960 Summer Olympics in Rome, where he received a gold medal as the lead-off swimmer of the winning U.S. team in the 4×200-meter freestyle relay.
 Harrison, together with his American relay teammates Dick Blick, Mike Troy and Jeff Farrell, set a new world record of 8:10.2 in the event final.
Felicia Francesca Lee (born May 19, 1992) is an American competition swimmer.
 She is currently on the U.S. National Team, and was a member of the American silver medal team in the 4x50-meter medley relay at the 2014 FINA World Swimming Championships.
 She previously competed for Stanford University as a collegiate swimmer, and was recognized as the top college female swimmer in the United States in 2014.
Blake Pieroni (born November 15, 1995) is an American competition swimmer who specializes in freestyle events.
 At the US Olympic Trials, he qualified for the 2016 Summer Olympics in Rio de Janeiro as a 4×100 meter freestyle relay swimmer.
 In the heats, he swam a split time of 48.39 on the third leg, and the team went on to win the gold medal.

Question: Which Austro-Hungarian-born American competition swimmer and actor starred in Tarzan and the Amazons (1945)?
Answer: Johnny Weissmuller