Greek actress Katerina Lehou, playing the role of High Priestess, lights a torch during the dress rehearsal for the Olympic flame lighting ceremony for the Rio 2016 Olympic Games at the site of ancient Olympia in Greece, April 20, 2016. Fire spurted from the concave mirror as a priestess, kneeling in her long, pleated dress before a ruined Greek temple, focused the blazing sun's rays on her metal torch. Come rain or shine on Thursday's official lighting ceremony, Rio de Janeiro has now secured its Olympic flame, which will burn in the main Olympic stadium throughout the Aug. 5-21 games. About 2,500 people attended Wednesday's dress rehearsal for the meticulously-choreographed ceremony in Ancient Olympia, southern Greece, where the Olympics of antiquity were held for more than 1,000 years. The flame lit before the Temple of Hera will be kept as a backup, in case cloudy skies derail Thursday's ceremony, which will be attended by top International Olympic Committee officials and Rio organizers. (Photo by Yannis Behrakis/Reuters)





Greek actress Katerina Lehou, playing the role of High Priestess, carries the Olympic flame during the dress rehearsal for the Olympic flame lighting ceremony for the Rio 2016 Olympic Games at the site of ancient Olympia in Greece, April 20, 2016. (Photo by Alkis Konstantinidis/Reuters)





Greek actress Katerina Lehou, playing the role of High Priestess, passes the Olympic flame to a volunteer filling in for the first torch bearer, during the dress rehearsal for the Olympic flame lighting ceremony for the Rio 2016 Olympic Games at the site of ancient Olympia in Greece, April 20, 2016. (Photo by Alkis Konstantinidis/Reuters)





A priestess carries the Olympic Flame during the dress rehearsal for the Olympic flame lighting ceremony for the Rio 2016 Olympic Games at the site of ancient Olympia in Greece, April 20, 2016. (Photo by Yannis Behrakis/Reuters)





High Priestess Katerina Lehou stands in front of a line of priestesses during the dress rehearsal for the lighting of the Rio Olympics flame, in Ancient Olympia, southern Greece, on Wednesday, April 20, 2016. The meticulously choreographed ceremony will be repeated Thursday in the ruined birthplace of the ancient Olympics in southern Greece, in the presence of top International Olympic Committee and Rio organizing officials. That will touch off a relay that will conclude with the Rio Games opening ceremony in August. (Photo by Petros Giannakouris/AP Photo)





High priestess Actress Katerina Lehou, right, rises a torch as a priestess holds a pot with the Olympic Flame, during the final dress rehearsal of the lighting of the Olympic flame at Ancient Olympia, in western Greece on Wednesday, April 20, 2016. (Photo by Petros Giannakouris/AP Photo)





High Priestess Katerina Lehou holds a pot containing a backup flame for this summer's Rio Olympics, which she lit earlier in a dress rehearsal, in Ancient Olympia, southern Greece, on Wednesday, April 20, 2016. The meticulously choreographed ceremony will be repeated Thursday in the ruined birthplace of the ancient Olympics in southern Greece, in the presence of top International Olympic Committee and Rio organizing officials. That will touch off a relay that will conclude with the Rio Games opening ceremony in August. (Photo by Petros Giannakouris/AP Photo)





A priestess releases a white pigeon during the final dress rehearsal of the lighting of the Olympic flame at Ancient Olympia, in western Greece on Wednesday, April 20, 2016. (Photo by Petros Giannakouris/AP Photo)





Priestesses dance during the final dress rehearsal of the lighting of the Olympic flame at Ancient Olympia, in western Greece on Wednesday, April 20, 2016. (Photo by Petros Giannakouris/AP Photo)





Actress Katerina Lehou as high priestess, holds a pot with the Olympic Flame, during the final dress rehearsal of the lighting of the Olympic flame at Ancient Olympia, in western Greece on Wednesday, April 20, 2016. (Photo by Petros Giannakouris/AP Photo)





Actress Katerina Lehou, right, as high priestess, lights a pot with the Olympic Flame, during the final dress rehearsal of the lighting of the Olympic flame at Ancient Olympia, in western Greece on Wednesday, April 20, 2016. (Photo by Petros Giannakouris/AP Photo)





Actress Katerina Lehou, right, as high priestess, lights a pot with the Olympic Flame, during the final dress rehearsal of the lighting of the Olympic flame at Ancient Olympia, in western Greece on Wednesday, April 20, 2016. (Photo by Petros Giannakouris/AP Photo)





Actress Katerina Lehou, right, as high priestess, lights a pot with the Olympic Flame, during the final dress rehearsal of the lighting of the Olympic flame at Ancient Olympia, in western Greece on Wednesday, April 20, 2016. (Photo by Petros Giannakouris/AP Photo)





Actress Katerina Lehou, right, as high priestess, lights a torch with the Olympic Flame, during the final dress rehearsal of the lighting of the Olympic flame at Ancient Olympia, in western Greece on Wednesday, April 20, 2016. The flame will be transported by torch relay to the Brazilian city of Rio de Janeiro, which will host the Aug. 5-21, 2016 Olympics. (Photo by Petros Giannakouris/AP Photo)





A priestess releases a white pigeon, left, as actress Katerina Lehou, bottom, as high priestess, holds a torch with the Olympic Flame, during the final dress rehearsal of the lighting of the Olympic flame at Ancient Olympia, in western Greece on Wednesday, April 20, 2016. (Photo by Petros Giannakouris/AP Photo)





A priestess releases a white pigeon during the dress rehearsal for the lighting of the Rio Rio de Janeiro Olympics flame, in Ancient Olympia, southern Greece, Wednesday, April 20, 2016. (Photo by Petros Giannakouris/AP Photo)





A priestess releases a dove inside the ancient Olympic Stadium during the dress rehearsal for the Olympic flame lighting ceremony for the Rio 2016 Olympic Games at the site of ancient Olympia in Greece, April 20, 2016. (Photo by Yannis Behrakis/Reuters)