Deputy Mayor of Newham, Cllr Christine Bowden, joined young people in unfurling the special Olympic Handover flag at the Town Hall in East Ham.
She said: "The eyes of the world are now turning to Newham as the main host borough for the 2012 Games. It is an exciting moment for us all."
Newham's handover festivities continue at its free four-day Under the Stars music extravaganza that begins on Thursday (August 28) in East Ham's Central Park. The handover flag will be flown throughout the event.
Sunday evening's classical music event featuring the Royal Philharmonic Orchestra will include a special Newham Welcomes the World intermission. Olympic gold medallist Tessa Sanderson OBE is set to appear on stage with a host of sporting heroes and performers.
There will also be exciting video presentations starring Newham people performing Olympic-inspired feats and reflecting on their dreams and ambitions for 2012.
Mayor of Newham, Sir Robin Wales, said: "The Games represents a once-in-a-lifetime opportunity for us to raise the profile of the borough and inspire people to participate in sport and healthy lifestyles.
"Residents were already excited about the 2012 Games, but the fact that Team GB has done so well in Beijing has only increased the feeling of excitement and anticipation. The 2012 Games may seem far away, but it will be here before we know it!"
