London, Paris, and Berlin are among the European capitals that have welcomed 2010 with fireworks and festivities.
Paris' Eiffel Tower was lit up in numerous colors while fireworks exploded over the Thames River in London, making midnight look more like high noon in the British capital.
German partygoers danced in front of Berlin's Brandenburg Gate to live bands and disc jockeys.
Earlier, fireworks lit up the sky over the Kremlin, with 100,000 Russians packing Red Square to welcome the new year.
Entire families, from infants to grandparents, braved the Russian cold to eat, drink, and play in traditional all-night New Year's celebrations.
Crowds are also packing New York City's Times Square to witness the traditional ball drop, marking the arrival of the new year in the United States.
Some information for this report was provided by AP.