Wales beat England 3-0 in the 2020 final to lift the trophy for the first time and will return to defend their title this year.
England will be looking to go one better than last year and claim the title for a fifth time but will face stiff competition from the likes of The Netherlands, three times winners, and 2019 champions Scotland.
There are plenty of other countries in with a shout including Northern Ireland, who have a formidable pairing of two top 30 order of merit players, Belgium and Australia.
Here is every country taking part, the players representing them this year and their outright odds to win the tournament.
(Odds via Paddy Power, all odds correct at the time of writing. Over 18s only. Please gamble responsibly and Be Gamble Aware. www.begambleaware.org).

. MILTON KEYNES, ENGLAND - MAY 28: Jonny Clayton of Wales celebrates after winning his Final match against Jose de Sousa of Portugal during Night 17 of the Unibet Premier League Darts at Marshall Arena on May 28, 2021 in Milton Keynes, England. (Photo by Alex Burstow/Getty Images)
Wales are the reigning and defending PDC World Cup of Darts champions Photo: Alex Burstow

. Brazil, China, Denmark & Hungary - 500/1
China: Jianfeng Lu & Wenqing Liu, Brazil: Diogo Portella (Pictured) & Artur Vale, Denmark: Andreas Toft Jorgensen & Niels Hinsoe, Hungary: Janos Vegso & Patrik Kovacs. Photo: Luke Walker

. Finland, Gibraltar, Hong Kong & Italy - 500/1
Finland: Marko Kantele (Pictured) & Veijo Viinikka, Gibealtar: Sean Negrette & Justin Hewitt, Hing Kong: Kai Fan Leung & Man Lok Leung, Italy: Danilo Vigato & Michele Turetta. Photo: James Chance

. Croatia, Philippines & Sweden - 300/1
Croatia: TBC, Philippines: Christian Perez & Lourence Ilagan, Sweden: Daniel Larsson (Pictured) & Johan Engstrom. Photo: Luke Walker

. Russia & Japan - 275/1
Russia: Boris Koltsov (pictured) & Evgenii Izotov, Japan: Matsuda Jun & Yoshihisa Baba. Photo: Alex Burstow

. USA, Spain & Singapore - 200/1
USA: Danny Lauby & Chuck Puleo, Spain: Jesus Nogeura & Jose Justicia, Singapore: Harith Lim & Paul Lim (Pictured). Photo: Luke Walker

. Czech Republic & South Africa - 150/1
Czech Republic - Karel Sedlacek & Adam Gawlas, South Africa - Devon Petersen (pictured) & Carl Gabriel. Photo: Luke Walker

1. Brazil, China, Denmark & Hungary - 500/1
China: Jianfeng Lu & Wenqing Liu, Brazil: Diogo Portella (Pictured) & Artur Vale, Denmark: Andreas Toft Jorgensen & Niels Hinsoe, Hungary: Janos Vegso & Patrik Kovacs. Photo: Luke Walker

2. Finland, Gibraltar, Hong Kong & Italy - 500/1
Finland: Marko Kantele (Pictured) & Veijo Viinikka, Gibealtar: Sean Negrette & Justin Hewitt, Hing Kong: Kai Fan Leung & Man Lok Leung, Italy: Danilo Vigato & Michele Turetta. Photo: James Chance

3. Croatia, Philippines & Sweden - 300/1
Croatia: TBC, Philippines: Christian Perez & Lourence Ilagan, Sweden: Daniel Larsson (Pictured) & Johan Engstrom. Photo: Luke Walker

4. Russia & Japan - 275/1
Russia: Boris Koltsov (pictured) & Evgenii Izotov, Japan: Matsuda Jun & Yoshihisa Baba. Photo: Alex Burstow