The Millennium Bridge is a pedestrian suspension bridge located in London, England. It spans the River Thames, connecting the City of London and the Tate Modern art gallery at Bankside. The bridge was opened on June 10, 2000, and was designed by the architects Foster and Partners, with the engineering firm Arup.

The bridge is 325 meters long and has a width of 4 meters. The deck of the bridge is made of steel, while the cables are made of steel and carbon fiber. The bridge has a unique design, with a curved deck that gives the appearance of a wave. The bridge also has a unique suspension system, which allows it to sway slightly to accommodate the movement of pedestrians.

The bridge was closed just two days after its opening due to unexpected swaying and wobbling. The engineers had to install dampers to reduce the sway of the bridge, which was reopened in 2002. Since then, the bridge has become a popular tourist attraction in London, offering spectacular views of the city and the River Thames.

The Millennium Bridge is also known as the "Wobbly Bridge" due to its initial wobbling. The bridge has also been featured in various films and TV shows, including the Harry Potter film series and the Doctor Who TV series.