The 'Big Five' and the host country make their appearance in the Semi-Final in which they vote. This was determined during the Semi-Final Allocation Draw earlier this year.
"It will look so much better to show the Big Five and the host country on the Eurovision Song Contest stage, performing their act as they will be in the Grand Final," said Jon Ola Sand, Executive Supervisor of the contest on behalf of the EBU.
To avoid the need to extend the length of the Semi-Finals, shortened clips of the 'Big Five' and host country stage performances will be shown, recorded during the previous night's Dress Rehearsal.
In this year's first Semi-Final it's the turn of Spain, the United Kingdom and Italy. In the second Semi-Final, France, Germany and Ukraine will appear.
This year, Spain is represented by Manel Navarro, who performs his self-penned song Do It For Your Lover in a relaxed surfer style, surrounded by his friends. Manel and friends will perform in the second half of the Grand Final.
The United Kingdom chose Lucie Jones to represent them at this year's contest, with the ballad Never Give Up On You, which she belts out on a stage full of lights. Lucie will perform in the second half of the Grand Final.
The well-known Hamlet-taken words is the first line in Italy's song this year. They will perform in the first half of the Grand Final with their Sanremo Festival winning song Occidentali's Karma by Francesco Gabbani, who is accompanied on stage by his brother and co-composer on backing vocals duty and 'the naked ape' dancing next to him.