YOU can't miss her.

Thousands of people in Southampton will get their first glimpse of the world's largest cruise ship as she arrives in the city tomorrow.

Harmony of the Seas will make her bow in the city, giving residents their first chance to see the 227,000 ton behemoth travelling up Southampton Water and in to port.

The vessel has cost more than $1billion to build, making her the most expensive ship in the Royal Caribbean line's 25-strong fleet.

And apart from the sheer scale of the ship it will also boast a host of fantastical features ranging from robot barmen and giant slides to a central park.

The ship is 361 metres long, making her more than three times as long as Big Ben is tall, and will carry 6,000 passengers.

She will depart from Southampton on a series of getaways to the western Mediterranean, with passengers able to enjoy stopovers in exotic locations such as Barcelona, Marseille and Naples, with her first cruise leaving Southampton on May 29.

And there will be plenty to keep passengers occupied during cruises.

At the heart of the ship will be its park, taking its inspiration from New York's Central Park and offering an opportunity to take a stroll, have a coffee and stop for a bite to eat.

Cruise-goers will never want for new flavours to try out, with 16 restaurants including everything from household names such as Jamie's Italian, Far Eastern cuisine and cuisine designed to tempt all of the tastebuds, such as liquid lobster and vanishing noodles at Wonderland Imaginative Cuisine.

And drinks with a difference will also be served up, with robotic barmen picking from dozens of spirits to create cocktails in its Bionic Bar.

Harmony of the Seas will feature the Ultimate Abyss, the tallest slide at sea which will send thrillseekers from deck 16 to six in a matter of seconds, while it also boasts water cannons, a jungle gym and a zip line.

Residents will be able to get their first look at Harmony of the Seas from Calshot at about 5am, before she docks alongside Departures Terminal Berth 101 shortly after 6.15am.

The best places to see her as she comes in to Southampton will be Mayflower Park.