With 205 countries competing in the London 2012 Olympics and the letter "U" closer to the rear of the alphabet, it took some time for the United States delegation to make its way into the Olympic stadium during the Opening Ceremony (and it took even longer if you were waiting for NBC to show it). But at long last, two-time gold medalist fencer Mariel Zagunis led Team USA in the "Parade of Nations" as the flag-bearer.

Wearing their berets, blue blazers and white pants/skirts (made in China), members of the U.S. team were all smiles in London. Seemingly as awestruck as the audience, many of the American athletes were so fascinated with the spectacle around them that they couldn't help but pull out their iPhones to take photos of their own.

Here are photos of the U.S. Olympians as they joined the Opening Ceremony festivities.

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  • Team USA

    United States's Mariel Zagunis carries the flag during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    Professional basketball player LeBron James takes pictures with members of the the United States' Olympic team during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    Professional basketball player LeBron James takes pictures with the United States' Olympic team during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    The United States team parade during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    United States's Mariel Zagunis carries the flag during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    United States' Kobe Bryant marches among teammates during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    Professional basketball player LeBron James takes pictures with members of the the United States' Olympic team during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    The United States' Olympic team arrives during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    The United States' Olympic team arrives during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    Athletes from the United States pose for photographs during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    Athletes from the United States parade during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    Athletes from the United States parade during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    Athletes from the United States parade during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    Athletes from the United States parade during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    United States' Kobe Bryant smiles during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    Athletes from the United States parade during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London.

  • Team USA

    Athletes from the United States team wave to the crowd during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England.

  • Team USA

    Athletes from the United States team wave to the crowd during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England.

  • Team USA

    Athletes from the United States team wave to the crowd during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England.

  • Team USA

    Mariel Zagunis of the United States Olympic fencing team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England.

  • Team USA

    Athletes from the United States delegation wave as they parade during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England.

  • Team USA

    Athletes from the United States parade during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England.

  • Team USA

    Mariel Zagunis of the United States Olympic fencing team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England.

  • Team USA

    Sprinter Tyson Gay (L) of the United States enters the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England.

  • Team USA

    Members of the United States team parade through the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England.

  • Team USA

    Fencer Mariel Zagunis leads Team USA into the stadium during the Opening Ceremony for the 2012 Olympic Summer Games, Friday, July 27, 2012, in London.