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A festival of colors at London's Notting Hill Carnival

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Members of the Paraiso School of Samba prepare to perform at the Notting Hill Carnival on August 27, 2012 in London, England.

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Revelers dance at the carnival on August 26, 2012.

Luke MacGregor / Reuters

A performer dances in the street near police officers during the children's day parade on August 26, 2012.

Luke MacGregor / Reuters

A performer is painted green during the children's day parade.

London's Notting Hill Carnival, the largest street festival of its kind in Europe — expected to attract around 1 million revelers this year— began on Sunday with brightly costumed dancers and traditional floats parading along a three-and-a-half mile route.

The Caribbean-inspired celebration, which has taken place every August Bank Holiday since 1966, reaches its climax on Monday. Read more about the carnival from NBC News' U.K. partner ITV News.

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A woman mixes rum punch.

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A couple watch the carnival from a first-floor window on Portobello Road.

Oli Scarff / Getty Images

Revelers cover each other in paint and flour.