Michael Phelps with each of his Olympic medals: The Makings of Greatness
Gold medalist Michael Phelps, silver medalist Takashi Yamamoto of Japan and bronze medalist Stephen Parry of Great Britain celebrate during the medal ceremony of the 200-meter butterfly event on August 17, 2004 during the Athens Olympics. (Nick Laham/Getty Images)
Michael Phelps stands on the podium with his bronze medal as the relay team of South Africa celebrates winning gold in the men’s swimming 4 x 100-meter freestyle relay final on August 15, 2004 in Athens. (Daniel Berehulak/Getty Images for FINA)
Michael Phelps stands on the podium with his gold medal for the 200-meter individual medley on August 19, 2004 at the Athens Olympics. (Alexander Hassenstein/Bongarts/Getty Images)
Gold medalist Michael Phelps (center) shows off his gold medal for the men’s swimming 100-meter butterfly event on August 20, 2004 in Athens. (Shaun Botterill/Getty Images)
Ian Thorpe (center), the 200-meter freestyle gold medal winner, is flanked by bronze medalist Michael Phelps and silver medalist Pieter van den Hoogenband (right) at the 2004 Summer Olympic Games in Athens. (Corey Sipkin/NY Daily News Archive via Getty Images)
Michael Phelps bites his gold medal after taking the top prize in the 400-meter individual medley during the 2004 Summer Olympic Games in Athens. (Corey Sipkin/NY Daily News Archive via Getty Images)
Michael Phelps congratulates Ian Crocker and Jason Lezak of the United States relay team that won the gold medal in the 4 x 100-meter medley relay competition on August 21, 2004. Phelps did not swim in the final but received a gold medal for swimming the relay in the preliminaries. (Shaun Botterill/Getty Images)
Michael Phelps, Ryan Lochte, Peter Vanderkaay, and Klete Keller win gold in the Men’s 4 x 200-meter freestyle relay at the Athens 2004 Olympics. (Chris Ivin/WireImage)
Michael Phelps receives his gold medal during the medal ceremony for the 400m individual medley event at the Beijing 2008 Olympic Games on August 10, 2008. Phelps finished the race in a time of 4:03:84, a new World Record. (Al Bello/Getty Images)
(L-R) Michael Phelps, Garrett Weber-Gale, Cullen Jones, and Jason Lezak of the United States pose with the gold medal during the medal ceremony for the Men’s 4 x 100-meter freestyle relay on August 11, 2008 in Beijing, China. The United States finished the race in first place in a time of 3:08.24, winning the gold medal and set a new World Record. (Mike Hewitt/Getty Images)
Michael Phelps displays his gold medal in the 200-meter freestyle on August 12, 2008, during the Beijing Olympics. (Joe Rimkus Jr./Miami Herald/MCT via Getty Images)
(L-R) Michael Phelps, Ryan Lochte, Ricky Berens and Peter Vanderkaay pose with the gold medal on the podium during the medal ceremony for the Men’s 4 x 200m freestyle relay final during the Beijing Olympic Games on August 13, 2008. The United States won the race in a time of 6:58.56, a new World Record. (Photo: Paul Gilham/Getty Images)
Michael Phelps poses with the gold medal for the 200m butterfly at the Beijing Olympic Games on August 13, 2008. Phelps finished the race in a time of 1.52.49, a new World Record. (Adam Pretty/Getty Images)
Gold medalist Michael Phelps and bronze medalist Ryan Lochte (L) pose during the medal ceremony for the 200m individual medley final on August 15, 2008 in Beijing, China. Phelps won in a new world record time of 1.54.23. (Lars Baron/Bongarts/Getty Images)
Michael Phelps with his gold medal after winning the 100m butterfly final at the Beijing 2008 Olympic Games on August 16, 2008. It was with this prize that Phelps tied Mark Spitz’s record of winning seven gold medals in a single Olympic Games. (Bob Thomas/Getty Images)
Michael Phelps stands with teammates Brendan Hansen and Jason Lezak of the United States after winning the gold medal in the 4 x 100-meter medley relay on August 17, 2008 in Beijing. The United States team set a new world record with a time of 3:29:34. (Adam Pretty/Getty Images)
Michael Phelps and teammates Adrian Nathan (L), Ryan Lochte (2nd L) and Cullen Jones ® celebrate with the silver medals won during the 4 x 100-meter freestyle relay final at the London 2012 Olympic Games on July 29, 2012. (Adam Pretty/Getty Images)
Michael Phelps poses with his silver medal during the medal ceremony for the 200m butterfly final at the London 2012 Olympic Games on July 31, 2012. (Al Bello/Getty Images)
Gold medallist Michael Phelps shakes hands with silver medallist Ryan Lochte during the medal ceremony for the 200-meter individual medley final at the London 2012 Olympic Games on August 2, 2012. (Ezra Shaw/Getty Images)
Michael Phelps smiles with his gold medal after the medal ceremony in the 100m butterfly on August 3, 2012. The medal was Phelps’ 17th career gold medal. (David Eulitt/Kansas City Star/MCT via Getty Images)
Michael Phelps kisses his nineteenth Olympic medal, a gold he earned with teammates in the 4 x 200-meter freestyle relay, making him the athlete with the most medals in Olympic history. (Robert Gauthier/Los Angeles Times via Getty Images)
Matthew Grevers, Brendan Hansen, Michael Phelps and Nathan Adrian hold their gold medals after winning the 4 X 100-meter medley relay event in London on Aug. 4, 2012. (Michael Sohn/AP)
Michael Phelps poses with his gold medal as he celebrates with his team at the victory ceremony for the men’s 4 x 100m freestyle relay event on August 7, 2016 in Rio. (REUTERS/Marcos Brindicci)
Michael Phelps of the USA wins Gold in the Men’s 200m Butterfly Final on Day 4 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 9, 2016 in Rio de Janerio, Brazil. (Photo by Vaughn Ridley/Getty Images)
A look back at the world’s most decorated Olympian receiving all 25 of his Olympic medals - 21 gold, 2 silver, and 2 bronze. How many more will he add before the Rio Olympics is over?
