Jude Bellingham was officially unveiled as a Borussia Dortmund player on Monday.
The highly-rated Englishman is the latest talent from the country to seal a move to the German top-flight, following in the footsteps of soon-to-be club colleague Jadon Sancho.
Bellingham is revered as one of the finest young players in world football right now after his breakthrough season with Birmingham City in 2019/20.
In his 40 appearances in the Championship, the versatile midfielder scored four goals and assisted another three.
It's no surprise that the eyes of Europe's elite were fixated on the Stourbridge-born teenager, with Dortmund having to cough up a sizeable transfer fee to fend off the advances of Manchester United.
There's still some debate over the initial fee paid for Bellingham, but it's believed the deal could rise to around £30m.
But that's far from the most a club has paid for a player aged 18 or under.
Below, we've provided the 30 most expensive players ever within that age group, with Bellingham currently 11th on the list.
All data sourced from Transfermarkt
30. Ozan Kabak, Galatasary to Stuttgart
Age: 18
Season: 2018/19
Fee: €11m
29. Mateo Kovacic, Dinamo Zagreb to Inter Milan
Age: 18
Season: 2012/13
Fee: €11m
28. Paulo Dybala, Instituto to Palermo
Age: 18
Season: 2012/12
Fee: €11.9m
27. Breno, Sao Paolo to Bayern Munich
Age: 18
Season: 2007/08
Fee: €12m
26. Ezequiel Barco, Independiente to Atlanta United
Age: 18
Season: 2017/18
Fee: €12.3m
25. Bruma, Sporting Lisbon to Galatasaray
Age: 18
Season: 2013/14
Fee: €13m
24. Lucas Ocampos, River Plate to AS Monaco
Age: 18
Season: 2012/13
Fee: €13m
23. Alex Oxlade-Chamberlain, Southampton to Arsenal
Age: 17
Season: 2011/12
Fee: €13.8m
22. Diego Lainez, America to Real Betis
Age: 18
Season: 2018/19
Fee: €14m
21. Valeri Bojinov, Lecce to Fiorentina
Age: 18
Season: 2004/05
Fee: €14m
20. Sebastien Frey, Cannes to Inter Milan
Age: 18
Season: 1998/99
Fee: €14m
19. Gareth Bale, Southampton to Tottenham
Age: 17
Season: 2007/08
Fee: €14.7m
18. Romelu Lukaku, Anderlecht to Chelsea
Age: 18
Season: 2011/12
Fee: €15m
17. Paulinho, Vasco de Gama to Bayer Leverkusen
Age: 18
Season: 2018/19
Fee: €18.5m
16. Cristiano Ronaldo, Sporting Lisbon to Manchester United
Age: 18
Season: 2003/04
Fee: €19m
15. Willem Geubbels, Lyon to AS Monaco
Age: 16
Season: 2018/19
Fee: €20m
14. Stephan El Shaarawy, Genoa to AC Milan
Age: 18
Season: 2011/12
Fee: €20.3m
13. Pietro Pellergi, Genoa to AS Monaco
Age: 16
Season: 2017/18
Fee: €20.9m
12. Sergio Aguero, Independiente to Atletico Madrid
Age: 18
Season: 2006/07
Fee: €21.7m
11. Jude Bellingham, Birmingham City to Borussia Dortmund
Age: 17
Season: 2020/21
Fee: €23m
10. Alexandre Pato, Internacional to AC Milan
Age: 17
Season: 2007/08
Fee: €24m
9. William Saliba, Saint-Etienne to Arsenal
Age: 18
Season: 2019/20
Fee: €30m
8. Reinier, Flamengo to Real Madrid
Age: 18
Season: 2019/20
Fee: €30m
7. Antonio Cassano, Bari to AS Roma
Age: 18
Season: 2001/02
Fee: €31m
6. Alessandro Bastoni, Atalanta to Inter Milan
Age: 18
Season: 2017/18
Fee: €31.1m
5. Renato Sanches, Benfica to Bayern Munich
Age: 18
Season: 2016/17
Fee: €35m
4. Wayne Rooney, Everton to Manchester United
Age: 18
Season: 2004/05
Fee: €37m
3. Luke Shaw, Southampton to Manchester United
Age: 18
Season: 2014/15
Fee: €37.5m
2. Rodrygo Goes, Santos to Real Madrid
Age: 18
Season: 2019/20
Fee: €45m
1. Vinicius Junior, Flamengo to Real Madrid
Age: 18
Season: 2018/19
Fee: €45m
Amazingly, Real Madrid have spent €30m or more on three Brazilian players aged 18 or under in the past two years.
It's also hard to believe the Inter Milan were coughing up a fee of €14m for a teenage goalkeeper before the turn of the century - madness.
The list also puts into perspective just how expensive Rooney's move to United back in the summer of 2004 was.
Sixteen years on and the transfer is still the fourth most paid for a player aged 18 or under. Thankfully for the Red Devils, he was worth every single penny!