Actors dressed in ancient Greek costumes light the Olympic torch at original stadium . The solemn ceremony , held in the ruins of the 2,600-year-old Temple of Hera , saw actors in ancient Greek costume use a mirror to harness the sun 's rays and light the Olympic torch . Solemn ceremony marks the start of flame 's week-long journey to Britain . Comment: First runner is Greece 's champion swimmer Spyros Gianniotis .
Actors dressed in ancient Greek costumes light the Olympic torch at original stadium . Solemn ceremony marks the start of flame 's week-long journey to Britain . Comment: First runner is Greece 's champion swimmer Spyros Gianniotis .