The UK has welcomed in 2019 with a flurry of new year fireworks.
In London, Big Ben's customary bongs marked midnight, cheered on by an estimated gathering of 100,000 people.
The words "London is open" were spoken in seven languages during the display, which London mayor Sadiq Khan said sent a message that its EU citizens were Londoners and would always be welcome.
In Edinburgh, the city's street party was a 60,000 sell-out, with Franz Ferdinand the headline musical act.
Cardiff saw crowds gather in the city's Winter Wonderland outside the Civic Centre for fireworks and music, while in Belfast, City Hall was illuminated in a raft of colours for the event.
In central London, the soundtrack to the midnight show, which celebrated the capital's links with Europe, featured musical artists from the continent.
We Are Your Friends, Stay and Don't Leave Me Alone were some of the songs played during the 11-minute soundtrack.
"London is open" was spoken around two minutes into the display in Spanish, Polish, French, Romanian, German, Italian and then in English by the capital's mayor.
BBC One's New Year's Eve concert at Central Hall Westminster - either side of the fireworks - featured ska-pop legends Madness and was presented by this year's Strictly Come Dancing champion Stacey Dooley and finalist Joe Sugg.
Joe's Strictly partner Dianne Buswell joined him at the event, delighting fans of the show.
So proud of @Joe_Sugg and @StaceyDooley they both did so well! Also @dbuzz6589 making a sneaky appearance to which I screamed dianne at the screen and everyone stared at me😂#joanne #joesugg #diannebuswell #staceydooley— Joanne (@joannesuggfan) January 1, 2019
Edinburgh's Hogmanay event also focused on Europe, celebrating Scotland's ties with the rest of the continent.
One of the globe's largest street parties kicked off with pipe, drum and dance bands leading the annual Torchlight Procession through Edinburgh.
Aberdeen, Inverness and Stirling were among the other places throwing big New Year shindigs in Scotland.
Meanwhile, cities around the world had already enjoyed sparkling events for the start of 2019.
Islands in the Pacific were the first to mark the occasion, ahead of New Zealand and then Australia - where a massive fireworks display lit up Sydney Harbour Bridge for spectators on boats.