The words "London is open" rang in the new year as the British capital welcomed 2019 with a dazzling riverside fireworks display.
The phrase was spoken in seven languages around two minutes past midnight as the city skyline filled with lights in the largest annual display in Europe.
A soundtrack featuring Europe's finest musical artists celebrated the diversity of the capital, after Big Ben, silent for much of 2018 due to renovations, chimed once more.
Some 100,000 ticket-holders lined the banks of the Thames to watch 70,000 projectiles made up of eight tonnes of fireworks fire into the sky from three barges and the London Eye.
Across the English Channel, Parisians welcomed 2019 with a spectacular lights and firework show over the Arc de Triomphe, at the end of the French capital's famous Champs-Elysees avenue.
The display began punctually at midnight, and television pictures showed a huge crowd of people. Several hundred thousand had been expected to attend.
Fireworks illuminate the sky over the Quadriga statue of Germany's Brandenburg Gate. Source: AAP
During the lights show the names of the French football team that won the World Cup this year were projected onto the Arc de Triomphe.
As in previous years, following a string of deadly terrorist attacks in France, there were strict security measures in place. "Yellow vest" protesters had also announced a protest for the Champs-Elysees.
However celebrations appeared to have passed off peacefully.
In the New York City, the crystal ball dropped as rain-soaked throngs in Times Square cheered and smooched in celebration, joining revelers around the world in welcoming the New Year on Tuesday and saying goodbye to a tumultuous 2018.
For many, the sparkling sphere's time-honored descent came after hours spent in cold, wet weather -- a wait made easier by performances from entertainers such as Christina Aguilera, Sting and Snoop Dogg.
Just before the ball fell, Bebe Rexha sang John Lennon's "Imagine," and in the first moments of 2109 many in the square sang along to Frank Sinatra's "New York, New York," boomed from loudspeakers.
"It was like a true state of pure bliss and unity and love, and it felt like there was no hate in the world," Brie Dunn, 22, told ABC News as fireworks exploded overhead.
"That's what I hope for in 2019 and all the years to come."
A reveler celebrates as confetti falls during a celebration of the new year in New York's Times Square. Source: AAP
In Berlin, tens of thousands of people greeted 2019 at a huge party at Berlin's Brandenburg Gate, the largest New Year's Eve party in Germany.
Festivities culminated with a laser and fireworks display, which followed performances by musical acts including Eagle Eye Cherry and Bonnie Tyler.
Earlier, some 30,000 people in Japan welcomed in the New Year at Saitama Super Arena with Floyd Mayweather.
The American boxer soundly defeated his opponent, Japanese kickboxer Tenshin Nasukawa, in the first round of what was billed as three rounds of entertainment.
And as Russians raised toasts to celebrate across the country's 11 time zones, President Vladimir Putin stressed the need to rely on internal resources to improve living standards.
The clock at Spain's Puerta del Sol rings at midnight. Source: AAP
In a televised address just before midnight, Putin said, "we can achieve positive results only through our own efforts and well co-ordinated teamwork".
Meanwhile, hundreds of Thais travelled to Takien Temple in a suburb of Bangkok to lie inside coffins for traditional funeral rituals.
Participants believe the ceremony - symbolising death and rebirth - helps rid them of bad luck and allows them to be born again for a fresh start in the new year. 
Indians celebrate at the Kolkata Park street area. Source: SIPA USA
They held flowers and incense in their hands as monks covered them with pink sheets and chanted prayers for the dead.
In Auckland, tens of thousands gathered around Sky Tower as fireworks exploded from the top of the 328m structure.
Across the country thousands took to beaches and streets, becoming the first major nation to usher in 2019, with fireworks booming and crackling above city centres and harbours.
Fireworks light up Hong Kong's iconic skyline. Source: AAP
In New York, Snoop Dogg, Sting and Christina Aguilera will welcome 2019 in a packed Times Square along with revellers from around the world who come to see the traditional crystal ball drop.
Spectators began assembling early in the afternoon for the made-for-TV extravaganza.
The celebration will take place under tight security, with partygoers checked for weapons and then herded into pens, ringed by metal barricades, where they wait for the stroke of midnight.
Entertainers at the countdown event to celebrate the arrival of 2019 during the New Year's Eve celebration at Beijing Olympic Park. Source: AAP
- With dpa, Press Association, AFP
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