The £800m Oasis Of The Seas sailed into Southampton at 10am on Wednesday in dense fog, welcomed by a crowd of hundreds and helicopters circling overhead.
Weighing 225,282 tonnes, the 1,187ft ship is longer than London's The Shard is tall, and at 208ft wide, larger than the wingspan of a Boeing 747.
Passengers will be boarding all afternoon and it leaves Southampton for Vigo, Spain, and Fort Lauderale, Florida, tonight.
The Royal Caribbean cruise ship is 40 per cent larger than any other vessel to ever dock in the UK, and has the capacity to house 5,400 passengers and 2,394 crew.
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