The waiting is over, the acts have arrived in host city Liverpool and the Eurovision Song Contest is finally here.

The UK is staging this year's contest on behalf of 2022 winners Ukraine.

As it happened: Eurovision Song Contest first Semi-Final

The Eurovision final is taking place at the M&S Bank Arena, in the city's waterfront on Saturday 13 May.

It's the first Eurovision Song Contest to be held in the UK for 25 years.

The competition is made up of two semi-finals and the grand final - all of which are being broadcast live on the BBC.

This year's semi-finals are taking place on Tuesday 9 May and Thursday 11 May, at 20:00 BST, with ten countries from each show going through to the final.

In addition, the UK, Italy, France, Spain and Germany are already guaranteed a spot in that final, along with last year's winners, Ukraine.

This means 26 countries will compete for the glass microphone trophy.

Mae Muller will represent the UK with her track I Wrote A Song, the country's first female Eurovision entrant for five years.

She was born in 1997 - the year the UK last won Eurovision - and has previously supported Little Mix on tour.

As in recent years, there was no televised national selection show.

Instead, the BBC chose the winner in consultation with a management company.

All the entries for this year's contest can be found in our guide to every country's song.

The short answer is no. When tickets for all of the Eurovision shows went on sale at 12:00 GMT on Tuesday 7 March they sold out.

A final batch were released at 12:00 BST on Monday, 24 April.

As well as the three televised live shows - the semi-finals and the final - there are six preview shows which double as dress rehearsals.

costs ranged from £90 to £290 for the live semi-final shows, and from £160 to £380 for the live grand final. Preview show tickets cost between £30 and £280.

About 3,000 tickets have been made available to Ukrainians living in the UK.

More than 160 million people around the world are expected to watch the 2023 final.

In the UK, Eurovision will be broadcast live on BBC One.

The BBC's coverage will be hosted by Graham Norton, Hannah Waddingham, Alesha Dixon and Ukrainian singer Julia Sanina.

In addition, a special fan zone is accommodating up to 25,000 people at Liverpool's Pier Head, close to the arena.

Cultural events around the competition include a submarine parade through the city and a rave which will take place simultaneously in Liverpool and Kyiv.

Ukraine's Kalush Orchestra won the 2022 Eurovision song contest with their song Stefania.

Normally, the winning country hosts the following year's competition, but the ongoing war in Ukraine makes this impossible.

The European Broadcasting Union (EBU), which organises the contest, invited the UK to host on Ukraine's behalf as UK contestant Sam Ryder was the runner up in the 2022 show.

It will be the ninth time the UK has hosted the competition, and the fifth time it has done so on behalf of another country.

Broadcasters from the 37 countries taking part each pay an entrance fee to the EBU. In recent years these fees have totalled about £5m. The BBC does not make its contribution public.

Russia was expelled from the competition following its invasion of Ukraine.

BBC News has been told countries have been asked to pay more to make up for its loss. Three countries have said they will not take part as a result of the increase.

Some broadcasters are also thought to have been be worried about the additional costs of transporting equipment to the UK now it is no longer a member of the EU.

Staging the event is expected to cost the BBC between £8m and £17m.

The UK government has pledged £10m towards operational costs, while local authorities in Liverpool have committed £4m.

The semi-finals are decided wholly by a public vote, from competing countries and people in the rest of the world.

The six countries automatically guaranteed entry to the final vote on just one of the semi-finals. On Tuesday, that's Germany, France and Italy. On Thursday, that's the UK, Ukraine and Spain.

In the final, it's more complicated. Each of the 26 countries has a jury whose members rank all the final performances.

They award a fixed number of points to their top 10 acts: Respectively 12 points, 10 points, eight, seven, six, five, four, three, two and one.

The jury results are announced by each country in turn on the night.

Competing countries then award points to the other contestants based on viewer votes, following the same scoring system.

For the first time, in 2023 public votes from outside Europe will play a part. Worldwide votes will be combined and counted as if they are another country.

Eurovision has long been popular in Australia, and in 2015 it was invited to send an act as part of the contest's 60th anniversary celebrations.

It has been allowed to take part ever since. Like European countries, it pays a fee to the EBU to help fund the event.

However, Australia is barred from hosting. If it ever won, it would have to nominate a European nation to stage the contest on its behalf.

Other non-European countries, including Israel, are also allowed participate because they are members of the EBU.

Eurovisioncast is available on BBC Sounds, or search wherever you get your podcasts from.

(editor-in-charge：Press center5)