| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Emil Agyekum | ATH | 22 May 1999 | |
| Jöna Aigouy | ATH | 19 April 1999 | |
| Sacha Alessandrini | ATH | 7 June 1999 | |
| Téo Andant | ATH | 21 July 1999 | |
| Ramsey Angela | ATH | 6 November 1999 | |
| Lia Apostolovski | ATH | 23 June 2000 | |
| Anna Arnaudo | ATH | 18 October 2000 | |
| Wided Atatou | ATH | 15 July 1999 | |
| Kristal Awuah | ATH | 7 August 1999 | |
| Jeremiah Azu | ATH | 15 May 2001 | |
| Yauhen Bahutski | ATH | 7 September 1999 | |
| Petra Bánhidi-Farkas | ATH | 30 April 1999 | |
| Simone Barontini | ATH | 5 January 1999 | |
| Etson Barros | ATH | 16 March 2001 | |
| Nadia Battocletti | ATH | 12 April 2000 | |
| Andreas Bechmann | ATH | 28 September 1999 | |
| Meryem Bekmez | ATH | 31 July 2000 | |
| Jaël Bestué | ATH | 24 September 2000 | |
| Isabelle Boffey | ATH | 13 April 2000 | |
| Samantha Borutta | ATH | 7 August 2000 | |
| Luis Brandner | ATH | 9 October 2000 | |
| Nahuel Carabaña | ATH | 10 November 1999 | |
| Ragnar Carlsson | ATH | 16 November 2000 | |
| Molly Caudery | ATH | 17 March 2000 | |
| Kristjan Čeh | ATH | 17 February 1999 | |
| Antía Chamosa | ATH | 7 October 1999 | |
| Aude Clavier | ATH | 10 January 1999 | |
| Eloisa Coiro | ATH | 1 December 2000 | |
| Claudia Conte | ATH | 14 November 1999 | |
| Ethan Cormont | ATH | 29 September 2000 | |
| Andrea Cosi | ATH | 30 April 2001 | |
| Eliott Crestan | ATH | 22 February 1999 | |
| Andrea Dallavalle | ATH | 31 October 1999 | |
| Tuğba Danışmaz | ATH | 1 September 1999 | |
| Simon Ehammer | ATH | 7 February 2000 | |
| Diane van Es | ATH | 22 March 1999 | |
| Henrik Flåtnes | ATH | 26 December 2001 | |
| Aleksandra Formella | ATH | 27 October 2001 | |
| Christos Frantzeskakis | ATH | 26 April 2000 | |
| Kinga Gacka | ATH | 25 October 2001 | |
| Sara Gallego | ATH | 11 October 2000 | |
| Mario García | ATH | 29 June 1999 | |
| Yasmin Giger | ATH | 6 November 1999 | |
| Thomas Gogois | ATH | 24 June 2000 | |
| Jesús Gómez | ATH | 2 September 1999 | |
| Valentin Gondouin | ATH | 4 March 1999 | |
| Shana Grebo | ATH | 9 November 2000 | |
| Lisa Gunnarsson | ATH | 20 August 1999 | |
| Sondre Guttormsen | ATH | 1 June 1999 | |
| Lucy Hadaway | ATH | 11 June 2000 | |
| Münevver Hancı | ATH | 25 January 2001 | |
| Joshua Hartmann | ATH | 9 June 1999 | |
| Enzo Hodebar | ATH | 17 May 1999 | |
| Merle Homeier | ATH | 27 August 1999 | |
| Nathan Ismar | ATH | 30 March 1999 | |
| Nikoleta Jíchová | ATH | 29 August 2000 | |
| Axelina Johansson | ATH | 20 April 2000 | |
| Kevin Joite | ATH | 7 May 2000 | |
| Gémima Joseph | ATH | 17 October 2001 | |
| Sophia Junk | ATH | 1 March 1999 | |
| Dalia Kaddari | ATH | 23 March 2001 | |
| Lilly Kaden | ATH | 6 September 2001 | |
| Alperen Karahan | ATH | 27 October 2000 | |
| Emmanouil Karalis | ATH | 20 October 1999 | |
| Dzmitry Karpuk | ATH | 5 November 1999 | |
| Spyridoula Karydi | ATH | 30 January 2001 | |
| David Kenny | ATH | 10 January 1999 | |
| Jorinde van Klinken | ATH | 2 February 2000 | |
| Katrine Koch Jacobsen | ATH | 24 June 1999 | |
| Mykhailo Kokhan | ATH | 22 January 2001 | |
| Aliaksandra Konshyna | ATH | 14 August 2001 | |
| Erik Kostrytsya | ATH | 18 September 1999 | |
| Kinga Królik | ATH | 26 September 1999 | |
| Keshia Kwadwo | ATH | 10 July 1999 | |
| Sokhna Lacoste | ATH | 25 August 2000 | |
| Topias Laine | ATH | 12 July 2001 | |
| Manuel Lando | ATH | 4 August 2000 | |
| Henrik Larsson | ATH | 30 September 1999 | |
| Aarón Las Heras | ATH | 22 June 2000 | |
| Rūta Lasmane | ATH | 17 December 2000 | |
| Jasmijn Lau | ATH | 11 March 1999 | |
| Florian Le Pallec | ATH | 31 May 1999 | |
| Mallory Leconte | ATH | 4 October 2000 | |
| Silke Lemmens | ATH | 30 November 1999 | |
| Helena Leveelahti | ATH | 30 September 1999 | |
| Boris Linkov | ATH | 24 July 2000 | |
| Enrique Llopis | ATH | 15 October 2000 | |
| Sergio López | ATH | 5 July 1999 | |
| Klara Lukan | ATH | 8 September 2000 | |
| Baldvin Magnússon | ATH | 7 April 1999 | |
| Yaroslava Mahuchikh | ATH | 19 September 2001 | |
| Vasyl Makukh | ATH | 14 January 2000 | |
| Barbora Malíková | ATH | 30 December 2001 | |
| Louise Maraval | ATH | 31 July 2001 | |
| Carmen Marco | ATH | 17 December 1999 | |
| Asier Martínez | ATH | 22 April 2000 | |
| Riccardo Meli | ATH | 15 April 2001 | |
| Eduardo Menacho | ATH | 25 November 1999 | |
| Holly Mills | ATH | 15 April 2000 | |
| Mohamed Mohumed | ATH | 24 March 1999 | |
| Arnau Monné | ATH | 10 August 2000 | |
| Alessandro Moscardi | ATH | 14 April 2000 | |
| Odysseas Mouzenidis | ATH | 30 June 1999 | |
| Isaac Nader | ATH | 17 August 1999 | |
| Amanda Ngandu-Ntumba | ATH | 24 June 2000 | |
| Wilma Nielsen | ATH | 2 June 2001 | |
| Maja Nilsson | ATH | 8 December 1999 | |
| Johannes Nortmeyer | ATH | 17 May 1999 | |
| Michael Obasuyi | ATH | 12 August 1999 | |
| Lisa Oed | ATH | 2 January 1999 | |
| Ludovic Oucéni | ATH | 1 February 2001 | |
| István Palkovits | ATH | 27 December 2000 | |
| José Manuel Pérez | ATH | 10 September 1999 | |
| Ricky Petrucciani | ATH | 30 June 2000 | |
| Talea Prepens | ATH/BOB | 28 December 2001 | |
| Kyrylo Prykhodko | ATH | 8 June 2001 | |
| Leandro Ramos | ATH | 21 September 2000 | |
| Thomas Randolph | ATH | 7 February 1999 | |
| William Reais | ATH | 4 May 1999 | |
| El-Mir Reale | ATH | 26 July 1999 | |
| Flavie Renouard | ATH | 10 September 2000 | |
| Pol Retamal | ATH | 16 March 1999 | |
| Lea Riedel | ATH | 19 May 1999 | |
| Marie-Ange Rimlinger | ATH | 31 December 2001 | |
| Aitana Rodrigo | ATH | 15 March 2000 | |
| Sven Roosen | ATH | 27 July 2001 | |
| Markus Rooth | ATH | 22 December 2001 | |
| Rani Rosius | ATH | 25 April 2000 | |
| Gaia Sabbatini | ATH | 10 June 1999 | |
| Jonathan Sacoor | ATH | 1 September 1999 | |
| Cyréna Samba-Mayela | ATH | 31 October 2000 | |
| Eva Santidrián | ATH | 25 January 2000 | |
| Ersu Şaşma | ATH | 30 September 1999 | |
| Jessica Schilder | ATH | 19 March 1999 | |
| Edoardo Scotti | ATH | 9 May 2000 | |
| Camille Seri | ATH | 1 May 1999 | |
| Alessandro Sibilio | ATH | 27 April 1999 | |
| Pia Skrzyszowska | ATH | 20 April 2001 | |
| Milo Skupin-Alfa | ATH | 7 February 1999 | |
| David Sombé | ATH | 24 April 2000 | |
| Yasiel Sotero | ATH | 28 December 2001 | |
| Jan Štefela | ATH | 20 April 2001 | |
| Pauline Stey | ATH | 9 September 2001 | |
| Adrianna Sułek-Schubert | ATH | 3 April 1999 | |
| Amálie Švábíková | ATH | 22 November 1999 | |
| Teura'itera'i Tupaia | ATH | 6 February 2000 | |
| Kiira Väänänen | ATH | 6 January 1999 | |
| Andriy Vasyliev | ATH | 13 April 2001 | |
| Ruben Verheyden | ATH | 22 December 2000 | |
| Barbora Veselá | ATH | 17 January 2000 | |
| Lada Vondrová | ATH | 6 September 1999 | |
| Erin Wallace | ATH/TRI | 18 May 2000 | |
| Klaudia Wojtunik | ATH | 15 May 1999 | |
| Yannick Wolf | ATH | 12 May 2000 | |
| Natalia Wosztyl | ATH | 29 August 1999 | |
| Ben Zapka | ATH | 26 August 2000 | |
| Emma Zapletalová | ATH | 24 March 2000 | |
| Marta Zenoni | ATH | 9 March 1999 | |
| Karolina Łozowska | ATH | 28 May 1999 |